Understanding the side-chain effects on A–D–A acceptors: in-plane and out-of-plane

2018 ◽  
Vol 2 (8) ◽  
pp. 1563-1567 ◽  
Author(s):  
Qishi Liu ◽  
Zuo Xiao ◽  
Ting Li ◽  
Shangfeng Yang ◽  
Wei You ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Side Chain ◽  
Alkyl Chains ◽  
Donor Material ◽  
Out Of Plane

The in-plane and out-of-plane alkyl chains significantly affect the acceptors’ solubility and photovoltaic performance. NNFA[6, 6] and NNFA[12, 3] with medium solubility present suitable miscibility with the donor material, affording more favorable morphology and higher performance than other NNFAs.

Cytokinin Activity of a Group of Ureidopurine Derivatives Related to the tRNA Component, N-(Purin-6-ylcarbamoyl)threonine

1972 ◽  
Vol 50 (3) ◽  
pp. 237-243 ◽  
Author(s):  
W. H. Dyson ◽  
R. H. Hall ◽  
C. I. Hong ◽  
S. P. Dutta ◽  
G. B. Chheda
Keyword(s):  
Side Chain ◽  
Cytokinin Activity ◽  
Molecular Models ◽  
Straight Chain ◽  
Oh Groups ◽  
Alkyl Chains ◽  
Meta Position ◽  
Naturally Occurring ◽  
Intact Organism ◽  
Electronegative Group

Several ureidopurine derivatives have been tested for cytokinin activity in a soya bean callus assay system. N-(Purin-6-ylcarbamoyl)threonine (Ade-CO-Thr), a naturally occurring component of tRNA, is inactive in the assay. Analogues of Ade-CO-Thr having unmodified hydrocarbon side chains are active; optimal activity is associated with tert-butylureidopurine. In the homologous straight chain series n-butylureidopurine is the most active. Introduction of −COOH and/or −OH groups to analogues with otherwise active alkyl chains negates activity.The phenylureidopurine (PUP) derivative is barely active itself, though ortho-halogenated derivatives (o-chloro-, o-fluoro-PUP) are the most potent ureidopurines known. Biological activity decreases rapidly as the electronegative halide is moved from the ortho to the meta position, and lost entirely in the para position. Replacement of the ortho halide with a non-electronegative group (methyl) greatly reduces activity. Molecular models reveal that Ade-CO-Thr and o-chloro-PUP have nearly identical side-chain bulk. The carboxyl groups of Ade-CO-Thr and the chlorine atom of o-chloro-PUP occupy the same position relative to the electronegative carboxyl oxygen of the urea bridge. It is proposed that Ade-CO-Thr has a growth regulatory role in the intact organism, but that exogenous Ade-CO-Thr may be unable to reach the active site.

Solubilizing Side Chain Engineering: Efficient Strategy to Improve the Photovoltaic Performance of Novel Benzodithiophene‐Based (X‐DADAD) n Conjugated Polymers

2020 ◽  
Vol 41 (22) ◽  
pp. 2000430
Author(s):  
Ilya E. Kuznetsov ◽  
Sergey L. Nikitenko ◽  
Petr M. Kuznetsov ◽  
Nadezhda N. Dremova ◽  
Pavel A. Troshin ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Photovoltaic Performance ◽  
Side Chain ◽  
Efficient Strategy

An irreversible phase transition in 1-n-butylindeno[2,1-c]pyran-3,9-dione

2012 ◽  
Vol 68 (10) ◽  
pp. o413-o416 ◽  
Author(s):  
Andrei S. Batsanov ◽  
Judith A. K. Howard ◽  
Na Wu ◽  
Zhen Yang ◽  
Todd B. Marder
Keyword(s):  
Phase Transition ◽  
Ambient Temperature ◽  
Single Crystal ◽  
Title Compound ◽  
Room Temperature ◽  
Side Chain ◽  
Compound C ◽  
Planar Conformation ◽  
Triclinic Phase ◽  
Out Of Plane

At ambient temperature, the title compound, C16H14O3, is triclinic, with then-butyl side chain disordered in an out-of-plane orientation. On cooling below 240 K, it converts into a different triclinic phase with an ordered planar conformation and denser packing, which is retained on warming to room temperature. The transition (occasionally) proceeds from single crystal to single crystal.

scholarly journals Efficient polymer solar cells based on a new benzo[1,2-b:4,5-b′]dithiophene derivative with fluorinated alkoxyphenyl side chain

2015 ◽  
Vol 3 (6) ◽  
pp. 3130-3135 ◽  
Author(s):  
Weichao Chen ◽  
Zhengkun Du ◽  
Liangliang Han ◽  
Manjun Xiao ◽  
Wenfei Shen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polymer Solar Cells ◽  
Photovoltaic Performance ◽  
Side Chain

A polymer (PBDTPF-DTBT) was designed and synthesized, which exhibited high photovoltaic performance with PCE = 7.02%.

Side-chain effect on the photovoltaic performance of conjugated polymers based on benzodifuran and benzodithiophene-4,8-dione

MRS Advances ◽  
2019 ◽  
Vol 4 (36) ◽  
pp. 2001-2007
Author(s):  
Enfang He ◽  
Hong Zhang ◽  
Yueyue Gao ◽  
Fengyun Guo ◽  
Shiyong Gao ◽  
...  
Keyword(s):  
Fill Factor ◽  
Open Circuit Voltage ◽  
Polymer Solar Cells ◽  
Photovoltaic Performance ◽  
Open Circuit ◽  
Side Chain ◽  
Large Area ◽  
Device Structure ◽  
Roll To Roll ◽  
Solvent Additive

ABSTRACT:Two benzodifuran (BDF) polymers, PBDF-C and PBDF-S, with alkyl and alkylthio substituted thiophene side-chains and benzodithiophene-4,8-dione (BDD) as the acceptor were designed and synthesized. Their optical, electrochemical properties and photovoltaic performances were systematically investigated. The polymer solar cells (PSCs) with a device structure of ITO/PEDOT:PSS/polymer:PC71BM/Ca/Al were fabricated. The PBDF-C based device showed a power conversion efficiency (PCE) of 3.01% after adding 1 vol% 1,8-diodooctane (DIO) as the solvent additive, and PBDF-S gave an enhanced PCE of 3.48% without any post-treatments. The enhancements were from the higher open-circuit voltage (Voc) and fill factor (FF). The thermal- and solvent-treatment-free processing is more favourable for the large area roll-to-roll manufacturing or printing technology for PSCs.

Polymer side-chain substituents elucidate thermochromism of benzodithiophene–dithiophenylacrylonitrile copolymers – polymer solubility correlation of thermochromism and photovoltaic performance

2017 ◽  
Vol 8 (24) ◽  
pp. 3689-3701 ◽  
Author(s):  
Hung-Yang Chen ◽  
Chiao-Wen Lin ◽  
Chin-Ti Chen ◽  
Chao-Tsen Chen ◽  
Jan Golder ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Side Chain ◽  
Polymer Solubility

pBCNx polymers with different side-chain substituents for thermochromism and photovoltaic studies.

Alkoxyl Side Chain Substituted Thieno[3,4-c]pyrrole-4,6-dione To Enhance Photovoltaic Performance with Low Steric Hindrance and High Dipole Moment

2016 ◽  
Vol 49 (16) ◽  
pp. 5788-5795 ◽  
Author(s):  
Dangqiang Zhu ◽  
Qianqian Zhu ◽  
Chuantao Gu ◽  
Dan Ouyang ◽  
Meng Qiu ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Steric Hindrance ◽  
Photovoltaic Performance ◽  
Side Chain
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