scholarly journals Donor‐/Acceptor‐Substituted Tetrakis(arylethynyl)benzenes: The Influence of Donor Group on Optoelectronic Properties

ChemPlusChem ◽  
2019 ◽  
Vol 84 (9) ◽  
pp. 1391-1395
Author(s):  
Wataru Nojo ◽  
I. David Reingold ◽  
Jeremy P. Bard ◽  
Daniel T. Chase ◽  
Chun‐Lin Deng ◽  
...  
Keyword(s):  
Optoelectronic Properties ◽  
Donor Group ◽  
Donor Acceptor

scholarly journals Synthesis and optoelectronic properties of benzoquinone-based donor–acceptor compounds

2019 ◽  
Vol 15 ◽  
pp. 2914-2921
Author(s):  
Daniel R Sutherland ◽  
Nidhi Sharma ◽  
Georgina M Rosair ◽  
Ifor D W Samuel ◽  
Ai-Lan Lee ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Delayed Fluorescence ◽  
Optoelectronic Properties ◽  
Donor Group ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Palladium Catalyzed ◽  
Donor Acceptor

Herein, we report a mild and efficient palladium-catalyzed C–H functionalization method to synthesize a series of benzoquinone (BQ)-based charge-transfer (CT) derivatives in good yields. The optoelectronic properties of these compounds were explored both theoretically and experimentally and correlations to their structures were identified as a function of the nature and position of the donor group (meta and para) attached to the benzoquinone acceptor. Compound 3, where benzoquinone is para-conjugated to the diphenylamine donor group, exhibited thermally activated delayed fluorescence (TADF) with a biexponential lifetime characterized by a prompt ns component and a delayed component of 353 μs.

scholarly journals Donor Acceptor Copolymers from Cyclopentannulation Polymerizations with Dicyclopenta[cd,jk]pyrene and Dicyclopenta[cd,lm]perylene Acceptors

2020 ◽  
Author(s):  
Ain Uddin ◽  
Kyle Plunkett
Keyword(s):  
Thin Film ◽  
Cyclic Voltammetry ◽  
Light Absorption ◽  
Visible Region ◽  
Optoelectronic Properties ◽  
Band Gaps ◽  
Molecular Weights ◽  
Palladium Catalyzed ◽  
Donor Acceptor ◽  
Film Absorption

A series of donor-acceptor copolymers with dicyclopenta[cd,jk]pyrene and dicyclopenta[cd,lm]perylene acceptor units was prepared via palladium catalyzed cyclopenta-annulation reactions. The acceptor units were paired with diethynyl containing donor groups based on benzo[1,2-b:4,5-b']dithiophene, thieno[3,2-b]thiophene, and 4-octyl-4H-dithieno[3,2-b:2',3'-d]pyrrole to create six polymer variants. The cyclopentannulation polymerization resulted in copolymers with molecular weights (Mn) of 6-14 kDa and broad light absorption in the visible region with band gaps of 1.38-1.85 eV. The synthetic methodology, as well as optoelectronic properties, including thin-film absorption and cyclic voltammetry, of the donor-acceptor copolymers are presented.<br> <br><br>

Synthesis and Optoelectronic Properties of Janus-Dendrimer-Type Multivalent Donor–Acceptor Systems

2014 ◽  
Vol 80 (2) ◽  
pp. 882-896 ◽  
Author(s):  
Cagatay Dengiz ◽  
Benjamin Breiten ◽  
Jean-Paul Gisselbrecht ◽  
Corinne Boudon ◽  
Nils Trapp ◽  
...  
Keyword(s):  
Optoelectronic Properties ◽  
Donor Acceptor

scholarly journals Recent advances in high-performance organic solar cells enabled by acceptor–donor–acceptor–donor–acceptor (A–DA′D–A) type acceptors

2020 ◽  
Vol 4 (12) ◽  
pp. 3487-3504 ◽  
Author(s):  
Jiajun Zhao ◽  
Chao Yao ◽  
Muhammad Umair Ali ◽  
Jingsheng Miao ◽  
Hong Meng
Keyword(s):  
Molecular Structure ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Photovoltaic Performance ◽  
Optoelectronic Properties ◽  
Recent Advances ◽  
Donor Acceptor

In this review, we focus on the recent advances in organic solar cells enabled by A–DA′D–A type acceptors and summarize the correlation between molecular structure, molecular packings, optoelectronic properties, and photovoltaic performance.

scholarly journals Conjugation and optoelectronic properties of acetylenic scaffolds and charge-transfer chromophores

2008 ◽  
Vol 80 (3) ◽  
pp. 411-427 ◽  
Author(s):  
Milan Kivala ◽  
François Diederich
Keyword(s):  
Charge Transfer ◽  
Storage Capacity ◽  
Intramolecular Charge Transfer ◽  
Research Effort ◽  
Repetitive Sequences ◽  
Molecular Switches ◽  
Optoelectronic Properties ◽  
Three Dimensions ◽  
Donor Acceptor ◽  
And Storage

Our group started a research program in acetylene chemistry in 1987; since then, an intense research effort led to a fascinating journey into acetylenic scaffolding, aimed at exploring conjugative and optoelectronic properties of acetylenic chromophores. This journey included the generation of a unique molecular construction kit for acetylenic scaffolding, consisting of (E)-1,2-diethynylethenes [DEEs, (E)-hex-3-ene-1,5-diynes], tetraethynylethenes (TEEs, 3,4-diethynylhex-3-ene-1,5-diynes), chiral 1,3-diethynylallenes (DEAs, hepta-3,4-diene-1,6-diynes), 1,4-di and 1,1,4,4-tetraethynylbutatrienes, chiral trialkynylmethanes, and 1,1,2,2-tetraethynylethanes. These building modules were subsequently applied to the synthesis of carbon-rich architectures extending into one, two, and three dimensions. They include multinanometer-long monodisperse oligomers as models for infinite acetylenic polymers, molecular switches, perethynylated dehydroannulenes, expanded radialenes, and radiaannulenes, and an octamethoxy-substituted expanded cubane with a central C56 core. Donor-substituted cyanoethynylethenes (CEEs) and 1,1,4,4-tetracyanobuta-1,3-dienes (TCBDs) were introduced as new push-pull chromophores featuring intense intramolecular charge-transfer (CT) interactions. Dendritic multivalent CT chromophores were constructed using atom-economic, "click"-like reactions, and these systems were shown to behave as "molecular batteries", featuring exceptional electron uptake and storage capacity. The research finally led to the development of an unprecedented cascade reaction for the preparation of dendritic and oligomeric donor-acceptor (D-A) molecules. New [AB]-type oligomers become accessible in domino reactions involving repetitive sequences of [2+2] cycloadditions of tetracyanoethylene (TCNE) and tetrathiafulvalene (TTF) to polyynes, followed by retro-electrocyclizations.

Synthesis and Nonlinearity of Triene Chromophores Containing the Cyclohexene Ring Structure

1997 ◽  
Vol 488 ◽  
Author(s):  
Susan Ermer ◽  
Steven M. Lovejoy ◽  
Doris S. Leung ◽  
Hope Warren ◽  
Christopher R. Moylan ◽  
...  
Keyword(s):  
Dipole Moments ◽  
Heterocyclic Ring ◽  
Ring Structure ◽  
Ring System ◽  
Donor Group ◽  
Active Components ◽  
Cyclohexene Ring ◽  
Electro Optic ◽  
Donor Acceptor ◽  
Conjugated Polyenes

AbstractA series of conjugated donor-acceptor trienes in which the central double bond is incorporated into an unsaturated isophorone, verbenone or chromone ring has been synthesized. In each case, the donor group consists of an amine and an aromatic or heterocyclic ring system, and the acceptor is the dicyanomethylidene group. The nonlinear optical properties of each of the compounds has been measured and correlated with its structure. The dipole moments and molecular hyperpolarizabilities of these compounds, like those of other conjugated polyenes, are large enough to be used as the active components of electro-optic polymers. Unlike other donor-acceptor polyenes, however, these compounds exhibit the thermal stability required for such applications.

Ultrafast Photo-driven Charge Transfer Exciton Dynamics in Mixed-Stack Pyrene-Perylenediimide Single Cocrystals

2021 ◽  
Author(s):  
Michele Myong ◽  
Yue Qi ◽  
Charlotte L Stern ◽  
Michael R Wasielewski
Keyword(s):  
Charge Transfer ◽  
Steady State ◽  
Electron Donor ◽  
Optoelectronic Properties ◽  
Exciton Dynamics ◽  
Donor Acceptor

Electron donor-acceptor cocrystals are receiving increasing interest because of their many useful optoelectronic properties. While the steady-state properties of many different cocrystals have been characterized, very few studies have addressed...

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