Gesellschaft Deutscher Chemiker
Keine Benachrichtigungen
Sie haben noch keine Lesezeichen
Abmelden

Artikel

Three Proton‐Conductors Based on Keggin‐Type Polyoxometalates Well‐Arranged in the Networks of Dinuclear‐Cu(II)‐Mixed‐Organic‐Ligand Clusters

Von Wiley-VCH zur Verfügung gestellt

Three proton-conductive multicomponent crystalline materials have been designed and synthesized using a conventional solvent method. In them, Keggin-type POMs with different spatial arrangement patterns and HIN molecules are well-arranged in the hydrogen-bonding networks of dinuclear-Cu(II)-mixed-organic-ligand clusters, realizing the cooperative functional multicomponent combination for good proton-conductors.


Abstract

Three proton-conductors, [Cu(5-H2L)(IN)(H2O)]2H2[SiW12O40] ⋅ 2CH3CN ⋅ 2.5H2O (1), [Cu(4-HL)(HIN)(H2O)]2H2[SiW12O40] ⋅ 7H2O (2) and [Cu(4-HL)(HIN)(CH3CN)]2[HIN]2H4[PMo12O40]2 ⋅ 2CH3CN ⋅ 12H2O (3) (where 5-H2L/4-H2L is 5,5’/4,4’-bis(hydroxymethyl)-2,2’-bipyridine and HIN is isonicotinic acid), were synthesized at room temperature. Interestingly, three dinuclear-Cu(II)-mixed-organic-ligand clusters, [Cu(5-H2L)(IN)(H2O)]2 2+ cluster for 1, [Cu(4-HL)(HIN)(H2O)]2 2+ for 2 and [Cu(4-HL)(HIN)(CH3CN)]2 2+ for 3, are in situ synthesized under the coexistence of Keggin-type polyoxometalates. More interestingly, in 13, the global Keggin-type anions are well-arranged in the hydrogen-bonding networks of double-Cu(II)-mixed-organic-ligand clusters to give different spatial arrangement patterns. The [SiW12O40]4− anions in 1 display two dimensional layer pattern. The [SiW12O40]4− anions in 2 act as single bidentate O,O bridge ligands. The [PMo12O40]3− anions in 3 form the pair pattern. The AC impedance measurement results reveal 3 gives a high conductivity value over 10−3∼10−2 S ⋅ cm−1 in a wide temperature range from 25 to 100 °C under a wide relative humidity range from 35 to 98 %, while 1 and 2 give a middle conductivity value over 10−5∼10−4 S ⋅ cm−1 under the same conditions.

Zum Volltext

Überprüfung Ihres Anmeldestatus ...

Wenn Sie ein registrierter Benutzer sind, zeigen wir in Kürze den vollständigen Artikel.