Structural tuning of quinoxaline-benzodithiophene copolymers via alkyl side chain manipulation: synthesis, characterization and photovoltaic properties

2014 ◽  
Vol 2 (29) ◽  
pp. 11162-11170 ◽  
Author(s):  
Marta Tessarolo ◽  
Desta Gedefaw ◽  
Margherita Bolognesi ◽  
Fabiola Liscio ◽  
Patrik Henriksson ◽  
...  
Keyword(s):  
Side Chain ◽  
Alkyl Side Chain ◽  
Photovoltaic Properties

Effect of the alkyl side chain(s) on the optical, electronic, morphological and photovoltaic properties.

Impact of the alkyl side chain position on the photovoltaic properties of solution-processable organic molecule donor materials

2016 ◽  
Vol 4 (30) ◽  
pp. 11747-11753 ◽  
Author(s):  
J. Zhang ◽  
X. W. Zhu ◽  
C. He ◽  
H. J. Bin ◽  
L. W. Xue ◽  
...  
Keyword(s):  
Organic Molecule ◽  
Side Chain ◽  
Side Chains ◽  
Alkyl Side Chain ◽  
Photovoltaic Properties ◽  
Alkyl Side Chains ◽  
Solution Processable ◽  
New Compounds

Two new compounds with alkyl side chains at different positions have a similar structure, but exhibit different photovoltaic properties.

scholarly journals Molecular Weight-Dependent Physical and Photovoltaic Properties of Poly(3-alkylthiophene)s with Butyl, Hexyl, and Octyl Side-Chains

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3440
Author(s):  
Thanh-Danh Nguyen ◽  
Van-Hai Nguyen ◽  
Jongwoo Song ◽  
Jongdeok An ◽  
Ngoc-Thuan Truong ◽  
...  
Keyword(s):  
Chain Length ◽  
Acid Methyl Ester ◽  
Gel Permeation Chromatography ◽  
Fullerene Derivative ◽  
Quantum Yields ◽  
Side Chain ◽  
Alkyl Side Chain ◽  
Scanning Calorimetry ◽  
Photovoltaic Properties ◽  
Side Chain Length

A series of poly-3-alkylthiophenes (P3ATs) with butyl (P3BT), hexyl (P3HT), and octyl (P3OT) sidechains and well-defined molecular weights (MWs) were synthesized using Grignard metathesis polymerization. The MWs of P3HTs and P3OTs obtained via gel permeation chromatography agreed well with the calculated MWs ranging from approximately 10 to 70 kDa. Differential scanning calorimetry results showed that the crystalline melting temperature increased with increasing MWs and decreasing alkyl side-chain length, whereas the crystallinity of the P3ATs increased with the growth of MWs. An MW-dependent red shift was observed in the UV–Vis and photoluminiscence spectra of the P3ATs in solution, which might be a strong evidence for the extended effective conjugation occurring in polymers with longer chain lengths. The photoluminescence quantum yields of pristine films in all polymers were lower than those of the diluted solutions, whereas they were higher than those of the phenyl-C61-butyric acid methyl ester-blended films. The UV–Vis spectra of the films showed fine structures with pronounced red shifts, and the interchain interaction-induced features were weakly dependent on the MW but significantly dependent on the alkyl side-chain length. The photovoltaic device performances of the P3BT and P3HT samples significantly improved upon blending with a fullerene derivative and subsequent annealing, whereas those of P3OTs mostly degraded, particularly after annealing. The optimal power conversion efficiencies of P3BT, P3HT, and P3OT were 2.4%, 3.6%, and 1.5%, respectively, after annealing with MWs of ~11, ~39, and ~38 kDa, respectively.

scholarly journals Alkyl Side Chain Impact on the Charge Transport and Photovoltaic Properties of Benzodithiophene and Diketopyrrolopyrrole-Based Copolymers

2011 ◽  
Vol 115 (36) ◽  
pp. 18002-18009 ◽  
Author(s):  
Zhao Li ◽  
Yanguang Zhang ◽  
Sai-Wing Tsang ◽  
Xiaomei Du ◽  
Jiayun Zhou ◽  
...  
Keyword(s):  
Charge Transport ◽  
Side Chain ◽  
Alkyl Side Chain ◽  
Photovoltaic Properties

Effect of Alkyl Side-Chain Length on Photovoltaic Properties of Poly(3-alkylthiophene)/PCBM Bulk Heterojunctions

2009 ◽  
Vol 19 (20) ◽  
pp. 3300-3306 ◽  
Author(s):  
Abay Gadisa ◽  
Wibren D. Oosterbaan ◽  
Koen Vandewal ◽  
Jean-Christophe Bolsée ◽  
Sabine Bertho ◽  
...  
Keyword(s):  
Chain Length ◽  
Side Chain ◽  
Alkyl Side Chain ◽  
Bulk Heterojunctions ◽  
Photovoltaic Properties ◽  
Side Chain Length

An isomerized alkyl side chain enables efficient nonfullerene organic photovoltaics with good tolerance to pre/post-treatments

2021 ◽  
Vol 5 (7) ◽  
pp. 3050-3060 ◽  
Author(s):  
Chenyu Han ◽  
Huanxiang Jiang ◽  
Pengchao Wang ◽  
Lu Yu ◽  
Jianxiao Wang ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Side Chain ◽  
Alkyl Side Chain ◽  
Good Tolerance

An alkyl isomerization strategy is reported to finely modulate the crystallinity of nonfullerene acceptors as well as their photovoltaic responses to post-treatments.

scholarly journals Investigation of the Anti-Methicillin-Resistant Staphylococcus aureus Activity of (+)-Tanikolide- and (+)-Malyngolide-Based Analogues Prepared by Asymmetric Synthesis

2021 ◽  
Vol 22 (12) ◽  
pp. 6400
Author(s):  
Joseph Breheny ◽  
Cian Kingston ◽  
Robert Doran ◽  
Joao Anes ◽  
Marta Martins ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Asymmetric Synthesis ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Antimicrobial Properties ◽  
Side Chain ◽  
Alkyl Side Chain ◽  
Methicillin Resistant ◽  
Antibacterial And Antifungal

Herein, we report antibacterial and antifungal evaluation of a series of previously prepared (+)-tanikolide analogues. One analogue, (4S,6S)-4-methyltanikolide, displayed promising anti-methicillin-resistant Staphylococcus aureus activity with a MIC of 12.5 µg/mL. Based on the antimicrobial properties of the structurally related (−)-malyngolide, two further analogues (4S,6S)-4-methylmalyngolide and (4R,6S)-4-methylmalyngolide bearing a shortened n-nonyl alkyl side chain were prepared in the present study using a ZrCl4-catalysed deprotection/cyclisation as the key step in their asymmetric synthesis. When these were tested for activity against anti-methicillin-resistant Staphylococcus aureus, the MIC increased to 50 µg/mL.

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