Eu(iii)-coordination polymer sub-micron fibers: material for selective and sensitive detection of Cu2+ionsviacompetition between photoinduced electron transfer and energy transfer

2018 ◽  
Vol 6 (1) ◽  
pp. 153-161 ◽  
Author(s):  
Chanchal Hazra ◽  
Sajjad Ullah ◽  
Laís G. Caetano ◽  
Sidney J. L. Ribeiro
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Coordination Polymer ◽  
Photoinduced Electron Transfer ◽  
Sensitive Detection ◽  
Intramolecular Energy Transfer ◽  
Emission Signal ◽  
Pl Emission ◽  
P Addition

Addition of Cu2+ions to Eu(iii)-Guanine based fibers favors intramolecular energy transfer and suppresses electron transfer, leading to an enhancement Eu3+-based PL emission signal.

Alternating dialkylsilylene-divinylarene copolymers

2010 ◽  
Vol 82 (3) ◽  
pp. 613-624 ◽  
Author(s):  
Tien-Yau Luh
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Photoinduced Electron Transfer ◽  
Photophysical Properties ◽  
Polymeric Chain ◽  
Recent Advances

A summary of recent advances in the chemistry and photophysics of alternating dialkylsilylene-divinylarene copolymers is presented. The silicon moieties are considered to be insulating tetrahedral spacers in these copolymers. The substituents on silicon can readily be tuned, and the steric environment of these substituents around the silicon may dictate the conformation (or helicity) of the copolymers (the Thorpe–Ingold effect) and hence their photophysical properties. Because different chromophores can be regioregularly introduced into the polymeric chain, these copolymers have been used as models to study energy transfer and photoinduced electron transfer (PET), as well as chiroptical transfer.

Synergism of photocycloaddition and photoinduced electron transfer for multi-state responsive materials with high-stability and reversibility

2020 ◽  
Vol 56 (29) ◽  
pp. 4126-4129
Author(s):  
Xiao-Dong Yang ◽  
Mei-Jing Ma ◽  
Xin-Zhu Pang ◽  
Yun-Rui Chen ◽  
David Rooney ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Coordination Polymer ◽  
Photoinduced Electron Transfer ◽  
High Stability ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Responsive Materials

Dual-photoresponsive coordination polymer displaying color-distinguishable radical states has been obtained based on the synergism of photocycloaddition and photoinduced electron transfer reactions.

scholarly journals Synergistic photoredox and copper catalysis by diode-like coordination polymer with twisted and polar copper–dye conjugation

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yusheng Shi ◽  
Tiexin Zhang ◽  
Xiao-Ming Jiang ◽  
Gang Xu ◽  
Cheng He ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Coordination Polymer ◽  
Fluorescence Quenching ◽  
Ground State ◽  
Photoinduced Electron Transfer ◽  
Electronic Conductivity ◽  
Copper Catalysis ◽  
Reaction Conditions ◽  
Different Types ◽  
Inherent Problem

Abstract Synergistic photoredox and copper catalysis confers new synthetic possibilities in the pharmaceutical field, but is seriously affected by the consumptive fluorescence quenching of Cu(II). By decorating bulky auxiliaries into a photoreductive triphenylamine-based ligand to twist the conjugation between the triphenylamine-based ligand and the polar Cu(II)–carboxylate node in the coordination polymer, we report a heterogeneous approach to directly confront this inherent problem. The twisted and polar Cu(II)–dye conjunction endows the coordination polymer with diode-like photoelectronic behaviours, which hampers the inter- and intramolecular photoinduced electron transfer from the triphenylamine-moiety to the Cu(II) site and permits reversed-directional ground-state electronic conductivity, rectifying the productive loop circuit for synergising photoredox and copper catalysis in pharmaceutically valuable decarboxylative C(sp3)–heteroatom couplings. The well-retained Cu(II) sites during photoirradiation exhibit unique inner-spheric modulation effects, which endow the couplings with adaptability to different types of nucleophiles and radical precursors under concise reaction conditions, and distinguish the multi-olefinic moieties of biointeresting steride derivatives in their late-stage trifluoromethylation-chloration difunctionalisation.

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