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.

n-Alkylresorcinol Occurrence in Mercurialis perennis L. (Euphorbiaceae)

2010 ◽  
Vol 65 (3-4) ◽  
pp. 174-179 ◽  
Author(s):  
Peter Lorenz ◽  
Matthias Knödler ◽  
Julia Bertrams ◽  
Melanie Berger ◽  
Ulrich Meyer ◽  
...  
Keyword(s):  
Side Chain ◽  
Side Chains ◽  
Alkyl Side Chain ◽  
Alkyl Side Chains ◽  
Chain Lengths ◽  
New View

Investigation of the dichloromethane extracts from herbal and root parts of Mercurialis perennis L. afforded a mixture of 11 homologous n-alkylresorcinols (ARs) with saturated odd-numbered alkyl side chains (C15:0-C27:0). In addition to three predominant ARs (C19:0, C21:0 and C23:0), a number of minor ARs were identified by use of LC-MS/MS and GC-MS techniques. Among the compounds detected, four uncommon ARs with evennumbered alkyl side chain lengths were also determined. The overall AR concentration in herbal parts was 7 to 9 times higher compared to that of the roots. The results presented may open a new view on the phytochemistry and pharmacognosy of M. perennis and other members of the Euphorbiaceae family.

scholarly journals Aqueous Self-assembly of Peptide-Diketopyrrolopyrrole Conjugates with Variation of N-alkyl Side Chain and π-Core Lengths

2021 ◽  
Author(s):  
Sayak Subhra Panda ◽  
John D. Tovar
Keyword(s):  
Chain Length ◽  
Self Assembly ◽  
Photophysical Properties ◽  
Side Chain ◽  
Side Chains ◽  
Alkyl Side Chain ◽  
Organic Electronic ◽  
Side Chain Length ◽  
Alkyl Side Chains ◽  
Electronic Groups

Peptidic sequences when conjugated to π-electronic groups form self-assembled networks of π-electron pathways. These materials hold promise for bio-interfacing charge transporting applications because of their aqueous processability and compatibility. In this work, we incorporated diketopyrrolopyrrole (DPP), a well-established π-core for organic electronic applications, within the peptidic sequence. We embedded different numbers of thiophene rings (2 and 3) on both sides of the DPP to alter the length of the π-cores. We also varied the length of the N-alkyl side chains (methyl, butyl, hexyl) attached to the DPP core. These variations allowed us to explicitly study the effect of π-core and N-alkyl side-chain length on photophysical properties and morphology of the resulting nanomaterials. All of these molecules formed H-type aggregates in the assembled state. Longer π-cores have relatively red-shifted absorption maxima whereas the N-alkyl variation did not present significant photophysical changes.

scholarly journals Synthesis of New Derivatives of BEDT-TTF: Installation of Alkyl, Ethynyl, and Metal-Binding Side Chains and Formation of Tris(BEDT-TTF) Systems

2021 ◽  
Vol 7 (8) ◽  
pp. 110
Author(s):  
Songjie Yang ◽  
Matteo Zecchini ◽  
Andrew Brooks ◽  
Sara Krivickas ◽  
Desiree Dalligos ◽  
...  
Keyword(s):  
Metal Binding ◽  
Tricarboxylic Acid ◽  
Metal Salts ◽  
Side Chain ◽  
Side Chains ◽  
Ethynyl Group ◽  
X Ray ◽  
Transition Metal Salts ◽  
Alkyl Side Chains ◽  
Derivatives Of

The syntheses of new BEDT-TTF derivatives are described. These comprise BEDT-TTF with one ethynyl group (HC≡C-), with two (n-heptyl) or four (n-butyl) alkyl side chains, with two trans acetal (-CH(OMe)2) groups, with two trans aminomethyl (-CH2NH2) groups, and with an iminodiacetate (-CH2N(CH2CO2−)2 side chain. Three transition metal salts have been prepared from the latter donor, and their magnetic properties are reported. Three tris-donor systems are reported bearing three BEDT-TTF derivatives with ester links to a core derived from benzene-1,3,5-tricarboxylic acid. The stereochemistry and molecular structure of the donors are discussed. X-ray crystal structures of two BEDT-TTF donors are reported: one with two CH(OMe)2 groups and with one a -CH2N(CH2CO2Me)2 side chain.

scholarly journals Synthesis and Cytotoxic Evaluation of Carboxylic Acid-Functionalized Indenoisoquinolines

2019 ◽  
Vol 14 (5) ◽  
pp. 1934578X1984978 ◽  
Author(s):  
Nguyen Tien Dung ◽  
Le Nhat Thuy Giang ◽  
Pham Hoai Thu ◽  
Ngo Hanh Thuong ◽  
Dang Thi Tuyet Anh ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Cancer Cells ◽  
Spectral Methods ◽  
Acid Group ◽  
Side Chain ◽  
Cytotoxic Activities ◽  
Side Chains ◽  
Carboxylic Acid Group ◽  
New Compounds

In order to find out the influence of carboxylic acid functionalities in the N-lactam side chains of indenoisoquinolines on cytotoxic activities, several new compounds have been synthesized and structurally characterized by analytical and spectral methods. The incorporation of a carboxylic acid group into the lactam side chain of indenoisoquinolines results in differences in cytotoxicity. The results indicated that compound 18c displayed substantial cytotoxic specificity toward KB and HepG2 cancer cells.

scholarly journals Controlled steric selectivity in molecular doping towards closest-packed supramolecular conductors

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Shinya Kohno ◽  
Yu Yamashita ◽  
Naotaka Kasuya ◽  
Tsubasa Mikie ◽  
Itaru Osaka ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Steric Effects ◽  
Side Chain ◽  
Side Chains ◽  
Void Space ◽  
Alkyl Side Chains ◽  
Recent Developments ◽  
High Carrier ◽  
Molecular Doping ◽  
Steric Selectivity

Abstract Recent developments in molecular doping technologies allow extremely high carrier densities in polymeric semiconductors, exhibiting great diversity because of the unique size, conformation, and steric effect of molecular dopants. However, it is controversial how steric effects can limit the doping efficiency and to what extent dopants can be accommodated in polymers. Here, we employ two distinct conjugated polymers with different alkyl side-chain densities, where polymers are doped via anion-change, allowing greater variation in the incorporation of molecular dopants having different electrostatic potentials and shapes. We characterize the doping efficiency with regard to steric effects, considering the unique void space in the conjugated polymers. Our study reveals that doping efficiency of polymers with sparse alkyl side-chains is significantly greater than that with dense side-chains. A closest-packed supramolecule is realized with a particular combination of a sparse polymer and a large dopant, giving rise to high conductivity, air stability, and remarkably high work function. This work provides a critical insight into overcoming steric effects in molecular doping.

Synthesis and photovoltaic properties of thiophene–imide-fused thiophene alternating copolymers with different alkyl side chains

2011 ◽  
Vol 21 (33) ◽  
pp. 12454 ◽  
Author(s):  
Tomokazu Umeyama ◽  
Masaaki Oodoi ◽  
Osamu Yoshikawa ◽  
Takashi Sagawa ◽  
Susumu Yoshikawa ◽  
...  
Keyword(s):  
Side Chains ◽  
Photovoltaic Properties ◽  
Alternating Copolymers ◽  
Alkyl Side Chains

Low band gap conjugated polymers combining siloxane-terminated side chains and alkyl side chains: side-chain engineering achieving a large active layer processing window for PCE > 10% in polymer solar cells

2017 ◽  
Vol 5 (33) ◽  
pp. 17619-17631 ◽  
Author(s):  
Xuncheng Liu ◽  
Li Nian ◽  
Ke Gao ◽  
Lianjie Zhang ◽  
Lechi Qing ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Active Layer ◽  
Polymer Solar Cells ◽  
Hole Transport ◽  
Random Copolymers ◽  
Side Chain ◽  
Active Layer Thickness ◽  
Side Chains ◽  
Alkyl Side Chains ◽  
Thickness Tolerance

Side-chain random copolymers show high 3-D hole transport and offer excellent active layer thickness tolerance.

Impact of benzothiadiazole position on the photovoltaic properties of solution-processable organic molecule materials

2017 ◽  
Vol 234 ◽  
pp. 47-52 ◽  
Author(s):  
Jing Zhang ◽  
Linjun Xu ◽  
Jiawei Chen ◽  
Mingfu Ye ◽  
Ping Shen ◽  
...  
Keyword(s):  
Organic Molecule ◽  
Photovoltaic Properties ◽  
Solution Processable

Synthèse d'isoxazoles substitués en α de l'azote par une chaine alkyle ou alcényle

1990 ◽  
Vol 68 (8) ◽  
pp. 1271-1276 ◽  
Author(s):  
Jean-Claude Cherton ◽  
Marc Lanson ◽  
Daïf Ladjama ◽  
Yvette Guichon ◽  
Jean-Jacques Basselier
Keyword(s):  
Vinyl Acetate ◽  
Nitrile Oxide ◽  
Side Chain ◽  
Dipolar Cycloaddition ◽  
Side Chains ◽  
Alkyl Side Chain ◽  
Magnesium Compounds ◽  
Convenient Route ◽  
General Method ◽  
Convenient Access

Several syntheses of special isoxazoles bearing a long alkyl or alkenyl side chain in the α position of the nitrogen are presented. A very convenient route in the case of an alkyl side chain is the classical 1,3-dipolar cycloaddition of a nitrile-oxide to a vinyl acetate. Although it is a rather long approach, the reaction of hydroxylamine with enone-epoxides represents a new and unequivocal method compatible with alkenyl side chains. The isomerisation of the easily synthesized isoxazoles bearing such substitutents α to the oxygen, by the reaction of their isoxazolium salts with hydroxylamine, is a fast and general method. Another very convenient access to "α-N substituted" isoxazoles is the coupling of magnesium compounds with 3-bromomethyl 5-methyl isoxazole. Keywords: isoxazoles, substitution in the α position of nitrogen.

Sign in / Sign up

Export Citation Format

Share Document