Fachzeitschriften

ChemPhotoChem

Artikel

CW or Pulsed laser – That is the Question: Comparative Steady‐state Photocrystallographic Analysis of Metal Nitrosyl Linkage Isomers

von Asma Hasil et al.

· 14.03.2024

The investigation of photo-induced effects is profoundly influenced by the characteristics of photo-excitation sources. We present here a comprehensive analysis of the structures of two photoinduced linkage isomers (PLI) in a ruthenium nitrosyl comp...

Artikel

Transparent Near‐IR Dye‐Sensitized Solar Cells: Ultrafast Spectroscopy Reveals the Effects of Driving Force and Dye Aggregation

von Mate Kurucz et al.

· 14.03.2024

Near-IR dyes for transparent dye-sensitized solar cells: The effects of small driving forces (−ΔG) and excited state quenching by energy transfer to aggregates studied by femtosecond differential absorption and fluorescence spectroscopy for two DPP ...

Artikel

Suppression of Photocyclization of an Inverse Type Diarylethene Derivative by Inclusion into β‐Cyclodextrin

von Misato Suganuma et al.

· 14.03.2024

The photocyclization reactivity of an inverse type diarylethene derivative decreased by inclusion into β-cyclodextrin. From the detailed investigation using job-plots, NOESY spectra and DFT calculations, it was elucidated that this is ascribed to th...

Artikel

Isomerization dynamics of a novel cis/trans‐only merocyanine

von Nadine Blaise et al.

· 14.03.2024

The non-zwitterionic merocyanine derivative 2MeMC is a photoswitch with outstanding photoisomerization efficiency, photostability, especially in protic environment, and high switching rates, whose ring closure reaction to the spiropyran is inhibited...

Artikel

Front Cover: Transparent Near‐IR Dye‐Sensitized Solar Cells: Ultrafast Spectroscopy Reveals the Effects of Driving Force and Dye Aggregation (ChemPhotoChem 3/2024)

von Mate Kurucz et al.

· 14.03.2024

The Front Cover highlights one of the main ultrafast spectroscopic techniques used to study the light-induced molecular processes in transparent solar cells based on diketo pyrrolopyrrole dyes. A near-IR pump pulse excites the molecules, and photopr...

Artikel

Recent Advances in Perylene Diimides (PDI)‐based Small Molecules Used for Emission and Photothermal Conversion

von Hua Sun et al.

· 14.03.2024

Recent research enhanced our understanding of perylene diimides (PDIs), especially their fluorescence and photothermal properties. Interplay between radiative and nonradiative transitions controls emission and heat generation. This review explores e...

Artikel

Recent Advances in the Conversion of Methane to Syngas and Chemicals via Photocatalysis

von Ruitao Li et al.

· 14.03.2024

This review provides an overview on the recent research progress in the photocatalytic methane conversion to syngas and chemicals including photocatalytic reforming, photocatalytic partial oxidation and photocatalytic coupling of methane. Abstract...

Artikel

Quantum ChemicalStudyof a Dihydroazulene‐SpiropyranMulti‐StateMulti‐FunctionalMolecularSwitch

Artikel

Construction of the Red‐Green‐Blue Luminescence Conversion System Based on Donor‐Acceptor Dyes Exchange with Diels‐Alder Dynamic Covalent Bonds

Artikel

Effects of the introduction of tertiary amino linkages on the properties of phenothiazine derivatives as delayed emission fluorophores

Artikel

Comparison of Vinyldimethylaniline and Indolizine Donor Groups on Si‐Substituted Xanthene Core Shortwave Infrared Fluorophores

Artikel

Multi‐Resonance Thermally Activated Delayed Fluorescence Molecules for Triplet‐Triplet Annihilation Upconversion

Artikel

In Search of Visible Light Activatable Photocages: Structure‐Activity Relationship Study on C‐8 Substituted Indene‐fused‐coumarinyl Photoremovable Protecting Groups

Artikel

The impact of activation on the performance of optical oxygen sensing with the luminescent metal‐organic framework MOF‐76(Eu)

Artikel

Mesoporous SBA‐15 Supported CdS through Organosilane Ligand for Photo driven Cleavage of Aryl ether in Lignin and its Model Compound

Artikel

Multi‐azo Photoswitches for Improved Molecular Solar Thermal Energy Storage

Artikel

Genetically Encoded Lysine Analogues with Differential Light Sensitivity for Activation of Protein Function

von Joshua S. et al.

· 15.03.2024

Genetically encoded unnatural amino acids are useful tools for controlling protein function, but options for sequential activation of proteins using light as a trigger are limited. Here, we report the genetic encoding of two new photocaged lysine de...

Artikel

High Performance Organic Solar Cells Prepared with Bi‐Triangular Pyramidal Organic Phosphonium Interface Material

von Xinyue Cui et al.

· 14.03.2024

Double-dipole bi-tetraphenylphosphonium bromide exhibits excellent cathode modification effect for organic solar cell, HOMO level down to −7.32 eV. Abstract Nowadays, amine containing electrode interface material destroy the non-fullerene acceptor...

Artikel

Covalent and Visible‐Light Photoswitchable Derivatives of the Potent Synthetic Opioid Isotonitazene and Other Nitazenes

Artikel

Amino Acid Modified Hyper‐Cross‐Linked Polymer Enabling High‐efficient Photocatalytic Amines Oxidation Coupled with H2O2 Production

von Wei Gao et al.

· 12.03.2024

The introduction of L-phenylalanine resulting in a notable optimization of the bandgap structure, the utilization of photocarriers and the generation of ROS of HCPs H₃LP-HCPs, and achieving close to 100 % conversion efficiency and 100 % selectivity ...

Artikel

Photoelectrocatalytic Conversion of Nitrates to Ammonia: Effect of Proton Donor

Artikel

Photoinduced Tandem C‐O Bond Reduction / Ketyl Radical Addition Reactions of α‐Keto‐N,O‐Acetals Enabled by Proton‐Coupled Electron Transfer

Artikel

Ligand environment and light: two triggers for controlling cytotoxicity of ruthenium nitrosyl complexes

Artikel

Merging Photoredox with Nickel Catalysis for Decarboxylative Arylation of Indole‐3‐Acetic Acids with Aryl Halides

von Abhyuday Guin et al.

· 06.03.2024

Photoredox-catalysis was synergistically merged with nickel-catalysis for the synthesis of biologically important 3-benzyl indoles with good functional group tolerance. The merit of this methodology is demonstrated by the synthesis of amino acid der...

Artikel

Shape‐Editable Transparent Wood Based on In‐Situ Polymerization of Epoxy Vitrimers Embedded with Luminescent BODIPY Molecules for Smart Decoration Materials

von Tiantian Wu et al.

· 06.03.2024

A shape-editable transparent wood with luminescent BODIPY is applied to smart decoration materials. Abstract Transparent wood (TW) combining unique anisotropic structure has broad application prospects in the field of advanced building furniture m...

Artikel

Bigger is not better for indolino‐oxazoline photochemical properties

Artikel

Hydrodifluoromethylation of unactivated alkenes enabled by Visible‐Light Photocatalysis

von Avishek Kumar et al.

· 04.03.2024

Photocatalytic hydro-difluoromethylaton of unactivated alkenes has been developed using a commercially available difluoromethylating reagent (CF₂HSO₂Na). This methodology tolerates a variety of functional groups and allows late-stage modification of...

Artikel

Enhanced intersystem crossing in a thiohelicene

Artikel

Photoinduced [2+2] and [4+4] Cycloaddition and Cycloreversion Reactions for the Development of Photocontrollable DNA Binders

von Christoph Dohmen et al.

· 01.03.2024

In this Concept Article the scope, the limits, and the potential of the photoinduced [2+2] and [4+4] cycloaddition–cycloreversion sequence in the development of photoswitchable DNA binders are presented. Abstract In the current field of photopharm...

Artikel

Triplet Excited State Mechanistic Study of meso‐Substituted Methylthio Bodipy Derivative: Time‐Resolved Optical and Electron Paramagnetic Resonance Spectral Studies

Artikel

Recent Advances in Selenium‐Containing Non‐fullerene Acceptors for High‐Performance Organic Solar Cells

von Li Lyu et al.

· 27.02.2024

This review summarized the recent advances in Selenium-containing non-fullerene acceptors to give a deep insight into the relationship between molecular structure and photovoltaic performance. Abstract The diversity in molecular structures and sol...

Artikel

Polycyclic Heteroaromatic π‐Linkers Provide Dithienylethene Switches with Favorable Thermal and Photochemical Properties for Solar‐Energy Storage

von Thillaiarasi S et al.

· 27.02.2024

Through the incorporation of a polycyclic heteroaromatic π-linker between their thiophene units, dithienylethene switches are shown computationally to exhibit a photocyclization reaction well exploitable for solar-energy storage, while also occupyin...

Artikel

High‐Throughput Exploration of a Thioxanthone‐catalyzed Photoredox C−O Coupling

von Imogen C. et al.

· 26.02.2024

A metallaphotoredox C−O coupling reaction was optimized through the use of High Throughput Experimentation (HTE) and Design of Experiment (DoE) techniques. The resulting methodology utilizes more sustainable and cost effective materials than previou...

Artikel

Preparation of TiO2/Ni‐NG Mesoporous Microspheres and Photocatalytic Hydrogen Evolution Properties

von Le Zhang et al.

· 26.02.2024

Forming TiO₂ mesoporous microspheres with small particle size and can provide abundant active sites for photocatalytic hydrogen production due to their high surface area and mesoporous structure. In addition, graphene is selected as a co-catalyst fo...

Artikel

Intra and interatomic energy contributions in the photophysical relaxation of small aromatic molecules

von Jesús Jara‐Cortés et al.

· 23.02.2024

Based on appropriate PES data, the Interacting Quantum Atoms method (IQA) allows to quantify the atomic and pair contributions that promote the relaxation of an excited electronic state, thus providing mechanistic information useful for rationalisin...

Artikel

Bulk Heterojunction or Layer‐by‐Layer Structure PM6:L8‐BO Based Polymer Solar Cells Exhibiting an Efficiency of 17.84 % or 18.43 %

von Junwei Zhang et al.

· 22.02.2024

The PCE of 18.43 % and 17.84 % are achieved in LbL and BHJ PSCs with polymer donor PM6 and small acceptor L8-BO. Over 3 % PCE improvement can be obtained in LbL PSC, benefiting from the enhanced exciton dissociation, charge collection efficiency and...

Artikel

An Indacenodithieno[3,2‐b]thiophene‐based Organic Dye for P‐type Dye‐Sensitized Solar Cells and Photoelectrochemical H2O2 Production

von Bin Cai et al.

· 21.02.2024

A novel organic dye featuring an indacenodithieno[3,2-b]thiophene unit as the π-bridge, labeled as YB6, has been designed for p-type dye-sensitized solar cells (p-DSCs) and photoelectrochemical H₂O₂ production. Remarkably, it exhibits superior perfo...

Artikel

Light Triggered Reversible Aggregation/Dispersion of Hydroxy Azo‐benzenes During Photo Switching: Solvent, Ions Assisted Dispersion, and Induced Quenching Emission

von Samridhi Patel et al.

· 20.02.2024

Photoswitching of hydroxy azobenzene derivatives was studied in different solvents. It was observed that in polar solvents, showed unexpectedly very slow trans⇆cis isomerization. Studies showed that aggregation⇆dispersion was the cause of unusual st...

Artikel

Intermolecular photoinduced electron transfer in biosystems: impact of conformational transitions and multiple channels on kinetics

Artikel

Methylation Induces a Low‐energy Emissive State in N6‐methyladenine Containing Dinucleotides

von Danhong Wang et al.

· 13.02.2024

We discovere that when methylation occurs in a DNA dimer, a low-energy emissive species is induced and it is distinct from the previously reported monomer-like species as well as the charge-transfer exciplex species. Abstract Methylation of adenin...

Artikel

Photo‐Induced Radicals in Carbon Nitride and their Magnetic Signature

von Arianna Actis et al.

· 13.02.2024

The employment of carbon nitride as a photocatalyst is conditional to understanding its response to light and the nature of all the photogenerated species. Amongst the characterisation techniques, EPR spectroscopy occupies a central role since it pe...

Artikel

Avoiding Oxygen Removal for Photochemical Reactions – towards Water as the Solvent

von Gianna Pölderl et al.

· 13.02.2024

By encapsulating photosensitizers and reactants in tailored supramolecular assemblies, preservation of photoreactivity even in the presence of molecular oxygen can be observed. The focus of this concept article has been dedicated to aqueous solution...

Artikel

Investigating Ultrafast Electron Transfer in Graphene and Its Derivatives Composites by Femtosecond Transient Absorption Spectroscopy

von Dong Li et al.

· 12.02.2024

D−A composites prepared from graphene and its derivatives (GNDs) with photo-sensitizers play an essential role in solar energy conversion. This review summarizes the recent progresses in characterizing GNDs-based composites using transient absorptio...

Artikel

Enhance the efficiency of perovskite solar cells using W doped SnO2 electron transporting layer

von Nian Cheng et al.

· 12.02.2024

High quality W doped SnO₂ electron transporting layer is prepared using molecular precursor containing SnC₂O₄ and (NH₄)₁₀W₁₂O₄₁ ⋅ xH₂O, which could effectively modify the electric conductivity and energy band position of resulting SnO₂ film. Therefo...

Artikel

Chemical and photophysical properties of amine functionalized bis‐NHC‐pyridine‐RuII complexes

von Lorena Fritsch et al.

· 12.02.2024

Amine substitution in the backbone of a room temperature (r. t.) luminescent C^N^C ruthenium(II) complex alters the excited energy landscape such that at low temperature (l.t.) the typical luminescent relaxation of the ³MLCT (metal-to-ligand charge ...

Artikel

5‐Aryl Substituted 2‐(2‐Methoxyphenyl)benzoxazoles with Large Stokes Shifts: Synthesis, Crystal Structures and Optical Properties

von Isaí López‐Márquez et al.

· 09.02.2024

Unlike 2-(2-hydroxyphenyl)benzoxales (HBOs), 2-(2-methoxyphenyl)benzoxazoles (MBOs) lack the sought-after large Stokes shifts of the former which are necessary in fluorescence microscopy. Herein, we demonstrate that the 5-aryl substitution of MBOs a...

Artikel

Converting Conventional Host to TADF Sensitizer and Hot‐Exciton Emitter in Donor‐Adamantane‐Acceptor Triads for Blue OLEDs: A Computational Study

von Ramalingam Mahaan et al.

· 05.02.2024

TADF Sensitizer and Hot-Exciton Emitter: The conventional host molecule undergoes a conversion into a TADF sensitizer and a Hot-Exciton emitter via distinct donor and acceptor unit substitutions on the adamantane core. Molecules incorporating accept...

Artikel

Efficient Solid‐State Ultraviolet Emission of 2′,5′‐Dioxy‐p‐terphenyls

von Masaki Shimizu et al.

· 03.02.2024

Introduction of two alkoxy/siloxy groups at the 2′ and 5′-positions of p-teraryls has been demonstrated to be an effective molecular design strategy for developing fluorophores that exhibit efficient solid-state ultraviolet (UV) emission. The design...

Artikel

Revisiting the Chemistry and Photophysics of 3‐(N‐Methylpyridinium‐4‐yl)Coumarins for Designing “Covalent‐Assembly” and “Molecular Disassembly” Fluorescent Probes

von Vincent Gaumerd et al.

· 30.01.2024

The double face of N -methylpyridinium moiety!!! Synthesis and photophysics of 7-(diethylamino)/7-hydroxycoumarins bearing N-methylpyridinium-4-yl group as C3 substituent were studied for identifying novel fluorophores usable in activity-based ...

Artikel

A Guide to Chemical Reactions Design in Carbon Nitride Photocatalysis

von Oleksandr Savateev et al.

· 30.01.2024

This article provides general guidelines, which are used to design photocatalytic organic transformations using graphitic carbon nitrides. It includes discussion of the local chemical structure of carbon nitride excited state, its redox potentials a...

Artikel

Charge‐Transfer Modulation of Emissivity in Polarized Diketopyrrolopyrroles

von G. Dinesh et al.

· 27.01.2024

Modulation of strength and position of electron-donating substituent directly linked to a diketopyrrolopyrrole core offers an interesting approach towards fine-tuning their photophysics. Depending on the type of cyclic tertiary aromatic amine either...

Artikel

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

von Sheetal Kumari et al.

· 27.01.2024

Graphical abstract showing the photoluminescence studies (emission spectra) of Er³⁺ doped SYW phosphors. The emission spectra recorded under the 380 nm excitation wavelength in the range 500–700 nm Abstract A series of Er³⁺ ions doped Sr₉Y₂W₄O₂₄ (...

Artikel

Circularly Polarized Luminescence Switching of Chiral Perylene Diimide‐Doped Nematic Liquid Crystal Using DC Electric Field

von Seika Suzuki et al.

· 25.01.2024

Chiral luminescent nematic liquid crystals emit strong CPL signals and act as a reversible CPL switch regulated by turning the applied DC electric field on and off. Abstract To obtain chiral luminescent nematic liquid crystals (N*-LCs), two sets o...

Artikel

Slowing Hot Electron Cooling in CdSe Quantum Dots Using Electron‐Rich Exciton‐Delocalizing Ligands

von Matthew T. et al.

· 25.01.2024

Ordinarily, hot electrons cool within a few hundred femtoseconds in CdSe. However, chemical treatment of CdSe with the electron-rich MeOPTC generates hole-ligand interfacial states which disrupt the hot electrons’ cooling process, preventing a fract...

Artikel

Photocatalytic metal‐free oxidation of alcohols with molecular oxygen in supercritical CO2 medium

von Vladislav G. et al.

· 25.01.2024

2-Fluoroanthraquinone has been identified as a non-toxic and accessible organic photocatalyst for green oxidation of alcohols to carbonyls in supercritical (sc) CO₂. Tuning of scCO₂ medium near the critical point allowed attaining high conversions (...

Artikel

Unveiling the Ultrafast Electron Transfer Dynamics in Epitaxial Dodecahedron CsPbBr3/Au Heterostructure

von Samaresh Samanta et al.

· 23.01.2024

Femtosecond transient absorption spectroscopy has been utilized to understand the charge transfer dynamics of CsPbBr₃/Au heterostructure. We find that distinct fast electron transfer in the CsPbBr₃/Au heterostructure, which is mainly ascribed to the...

Artikel

Effective light‐induced fluorescent H‐aggregation of fluorinated pyridyl‐azo dye via photoisomerization

von Jitendra Modi et al.

· 23.01.2024

An effective and efficient way was developed to convert monomer fluorinated pyridyl-azo dye to H-aggregated through UV-light induced trans-cis-trans photoisomerization. Abstract Here we present the synthesis of a new fluorinated pyridyl-azo dye an...

Artikel

Synthesis of Piperidine‐based Derivatives as Red Emitting Lu‐minescent Materials

von Zhao Wang et al.

· 23.01.2024

A novel piperidine-based red light material was efficiently constructed through a simple and mild reaction conditions. The color coordinates of 5 a (0.6978, 0.3020) and 5 af (0.6662, 0.3336) were near the standard red coordinates (0.67, 0.33) with e...

Artikel

Near‐infrared Emissive Indolizine Squaraine Fluorophores as Strong Molecular Viscosity Sensors

von David Ndaleh et al.

· 23.01.2024

A series of near-infrared absorbing and emitting indolizine squaraine fluorophores were designed and synthesized. The dyes were probed for their photophysical and electrochemical properties and observed to exhibit very high viscosity sensitivity. ...

Artikel

Tunable Phosphorescence in Metastable CuI Assemblies Prepared by Acid‐Fueled Crystal‐to‐Crystal Conversion

von Jingyi Fan et al.

· 23.01.2024

In this work, we report new metastable Cu^I assemblies prepared by crystal-to-crystal conversion that exhibit temperature-dependent phosphorescence complexity. Abstract Acid acts as a “fuel” in driving kinetic self-assembly, with crystals of the Cu^...

Artikel

Abatement of volatile organic compounds employing a thermoplastic nano‐photocatalyst layered on a glass reactor

von Fabiana Vento et al.

· 22.01.2024

Volatile Organic Compounds (VOCs) represent a wide class of dangerous pollutants. Here, a new gas-flow photoreactor coated with a thermoplastic TiO₂-based nanocomposite is developed and used in the solar-triggered photocatalytic degradation of commo...

Artikel

Computational Modelling and Mechanistic Insight into Light‐Driven CO Dissociation of Square‐Planar Rhodium(I) Complexes

von Tianbai Huang et al.

· 22.01.2024

C−H activation: Rh-phosphine complexes can activate C−H bonds in otherwise unreactive alkanes. Quantum chemical calculations provide mechanistic insights into the generation of the active species which is formed via the light-induced CO dissociation...

Artikel

Organic fluorophores with large Stokes shift for bioimaging and biosensing

von Hong Liu et al.

· 22.01.2024

The review has systematically summarized several methods recently developed to increase Stokes shift of fluorophores by structural modification, and highlighted typical applications of fluorophores with large Stokes shift in single-excitation multi-...

Artikel

The application of nitroarenes in catalyst‐free photo‐driven reactions

von Kunpeng Teng et al.

· 19.01.2024

In this review, the development of catalyst-free photo-induced reactions involving photoexcited nitroarenes is summarized and a brief outline of future directions in this field is provided. Abstract Nitroarenes are usually excited to form photoexc...

Artikel

Amino‐Acid Side‐Chain Nanoarchitectonics for Tuning the Chiroptical Properties and Supramolecular Structure of Pentameric Oligothiophenes

von Linnea Björk et al.

· 18.01.2024

Self-assembled Proteophenes. Oligothiophenes with distinct amino acid side-chain functionalities along the conjugated backbone displayed distinct chiroptical and structural properties in acidic or alkaline solutions. The distinct photophysical chara...

Artikel

D‐A* Co‐polymerization Realizing Chiral Thermally Activated Delayed Fluorescent Polymers for Highly Efficient Circularly Polarized Polymer Light‐emitting Diodes

von Jin‐Ming Teng et al.

· 18.01.2024

A pair of chiral TADF-active polymer emitters were designed and synthesized by the spiro donor-chiral acceptor strategy, and intense CPEL signals were detected from the corresponding CP-PLED devices. Abstract Circularly polarized electroluminescen...

Artikel

Utilization of Nickel ferrite (NiFe2O4) in Hematite (α‐Fe2O3) Photoanode for Photoelectrochemical Water Splitting as a Blocking Layer

von Na Kyung et al.

· 18.01.2024

The introduction of the NiFe₂O₄ layer into the hematite results in a reduction in the onset potential, signifying an enhancement in the performance of PEC water splitting. This shift is attributed to the inhibition of electron back transfer from the...

Artikel

Comparison of Different Advanced Oxidation Processes (AOPs) and Photocatalysts for the Degradation of Diclofenac

von Francesco Conte et al.

· 15.01.2024

Different advanced oxidation processes (AOPs), such as Fenton, photo-Fenton and heterogeneous photocatalysis have been tested towards the degradation of Diclofenac sodium salt. Toxicity tests performed using Daphnia magna as model species unveiled t...