Photo-responsive coordination compounds with photo-controllable electron-transporting and electrical conducting properties, and fabrication of organic electronics and organic resistive memory devices with photo-switchable performance
AssigneeThe University of Hong Kong
InventorsWing-Wah, Vivian YAM, Cheok-Lam WONG, Yau-Hin HONG, Mei-Yee CHAN
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Abstract
Disclosed is a new class of photo-responsive coordination compounds with at least one photochromic unit on a coordinating ligand. The photo-responsive coordination compounds are shown to be capable of acting as electroactive materials for the fabrication of organic memory devices as well as photo-controllable electron-transporting materials.
Claims15
A photo-responsive coordination compound comprising a chemical structure represented by formula (I):
- wherein
- a) X is oxygen, sulphur, selenium, NR or PR where R is an alkyl, alkylaryl, cycloalkyl, alkoxy, benzyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl or a heterocyclic group;
- b) A is cyclic structure derivative of substituted or unsubstituted arene or heteroarene;
- c) B, which is optionally fused with or singly-bonded to A, is cyclic structure derivative of substituted or unsubstituted heterocyclic group containing one or more nitrogen atoms;
- d) C is a photochromic unit;
- e) [MLn] represents the coordination unit containing a metal or main group element M and L is a ligand;
- f) k is a number of rings in the cyclic structure derivatives and k is an integer from 0 to 2;
- g) n is a number of ligands and n is an integer from 0 to 4;
- and
- h) m is a number of the photochromic ligand and m is an integer from 1 to 4.
An organic memory device comprising in sequence, an anode, an active layer comprising a cathode and a photo-responsive coordination compound having formula (I):
- wherein
- a) X is oxygen, sulphur, selenium, NR or PR where R is an alkyl, alkylaryl, cycloalkyl, alkoxy, benzyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl or a heterocyclic group;
- b) A is cyclic structure derivative of substituted or unsubstituted arene or heteroarene;
- c) B, which is optionally fused with or singly-bonded to A, is cyclic structure derivative of substituted or unsubstituted heterocyclic group containing one or more nitrogen atoms;
- d) C is a photochromic unit;
- e) [MLn] represents the coordination unit containing a metal or main group element M and L is a ligand;
- f) k is a number of rings in the cyclic structure derivatives and k is an integer from 0 to 2;
- g) n is a number of ligands and n is an integer from 0 to 4;
- and
- h) m is a number of the photochromic ligand and m is an integer from 1 to 4.
A photo-responsive electron-transporting material comprising a coordination compound having a formula (I):
- wherein
- a) X is oxygen, sulphur, selenium, NR or PR where R is an alkyl, alkylaryl, cycloalkyl, alkoxy, benzyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl or a heterocyclic group;
- b) A is cyclic structure derivative of substituted or unsubstituted arene or heteroarene;
- c) B, which is optionally fused with or singly-bonded to A, is cyclic structure derivative of substituted or unsubstituted heterocyclic group containing one or more nitrogen atoms;
- d) C is a photochromic unit;
- e) [MLn] represents the coordination unit containing a metal or main group element M and L is a ligand;
- f) k is a number of rings in the cyclic structure derivatives and k is an integer from 0 to 2;
- g) n is a number of ligands and n is an integer from 0 to 4;
- and
- h) m is a number of the photochromic ligand and m is an integer from 1 to 4.
Dependencies are inferred from the claim text.