scholarly journals Low Band Gap Coplanar Conjugated Molecules Featuring Dynamic Intramolecular Lewis Acid–Base Coordination

2016 ◽  
Vol 81 (10) ◽  
pp. 4347-4352 ◽  
Author(s):  
Congzhi Zhu ◽  
Zi-Hao Guo ◽  
Anthony U. Mu ◽  
Yi Liu ◽  
Steven E. Wheeler ◽  
...  
Keyword(s):  
Band Gap ◽  
Lewis Acid ◽  
Acid Base ◽  
Conjugated Molecules ◽  
Low Band Gap

Development of Novel C–H Bond Transformations and Their Application to the Synthesis of Organic Functional Molecules

Synlett ◽  
2018 ◽  
Vol 29 (16) ◽  
pp. 2093-2107 ◽  
Author(s):  
Yoichiro Kuninobu
Keyword(s):  
Hydrogen Bonding ◽  
Lewis Acid ◽  
Functional Materials ◽  
Personal Account ◽  
Acid Base ◽  
Base Interaction ◽  
Conjugated Molecules ◽  
Heteroaromatic Compounds ◽  
Acid Unit ◽  
Acid Base Interaction

This personal account summarizes our recent progress in the development of C–H transformations. We achieved ortho-selective C–H borylations and silylations by using Lewis acid–base interaction between two substrates and we achieved meta- and ortho-selective C–H borylations by using hydrogen bonding or Lewis acid–base interaction between a hydrogen donor or Lewis acid unit of a ligand and a functional group of a substrate. Regioselective C–H trifluoromethylations and related reactions of six-membered heteroaromatic compounds were realized at their 2- and 4-positions and at their benzylic positions. In addition, we developed C–H transformations directed towards the synthesis of organic functional materials, such as highly soluble polyimides or π-conjugated molecules containing either heteroatom(s) or a Lewis acid–base interaction.1 Introduction2 Regioselective C–H Transformations Controlled by Noncovalent Bond Interactions2.1 Regioselective C–H Transformations Controlled by Lewis Acid–Base Interaction between Two Substrates2.2 Regioselective C–H Transformation Controlled by Hydrogen Bonding between Ligand and Substrate2.3 Regioselective C–H Transformations Controlled by Lewis Acid–Base Interactions between Ligands and Substrates3 Trifluoromethylation and Related Transformations of Six-Membered Heteroaromatic Compounds3.1 2-Position-Selective C–H Trifluoromethylation of Six-Membered Heteroaromatic Compounds3.2 4-Position-Selective C–H Trifluoromethylation of Six-Membered Heteroaromatic Compounds3.3 Benzyl Position-Selective C–H Trifluoromethylation of Six-Membered Heteroaromatic Compounds4 C–H Transformations Leading to the Synthesis of Organic Functional Materials4.1 Heteroatom-Containing π-Conjugated Molecules4.2 π-Conjugated Molecules Containing a Lewis Acid–Base Interaction4.3 Soluble Polyimide Derivatives5 Conclusions

Large-Grained All-Inorganic Bismuth-Based Perovskites with Narrow Band Gap via Lewis Acid–Base Adduct Approach

2020 ◽  
Vol 12 (39) ◽  
pp. 43876-43884
Author(s):  
Qiaoying Jia ◽  
Cong Li ◽  
Weiye Tian ◽  
Malin B. Johansson ◽  
Erik M. J. Johansson ◽  
...  
Keyword(s):  
Band Gap ◽  
Lewis Acid ◽  
Narrow Band ◽  
Acid Base

Dicyanovinyl-substituted indolo[3,2-b]indole derivatives: low-band-gap π-conjugated molecules for a single-component ambipolar organic field-effect transistor

2016 ◽  
Vol 4 (40) ◽  
pp. 9460-9468 ◽  
Author(s):  
Illhun Cho ◽  
Sang Kyu Park ◽  
Boseok Kang ◽  
Jong Won Chung ◽  
Jin Hong Kim ◽  
...  
Keyword(s):  
Band Gap ◽  
Organic Semiconductors ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Intramolecular Charge Transfer ◽  
Indole Derivatives ◽  
Conjugated Molecules ◽  
Low Band Gap ◽  
Cooperative Effects ◽  
Effect Transistor

Via the cooperative effects of intramolecular charge transfer interactions and extension of conjugation, low-band gap organic semiconductors have successfully been prepared.

scholarly journals Elaboration of low-band-gap π-conjugated systems based on thieno[3,4-b]pyrazines

2020 ◽  
Vol 92 (2) ◽  
pp. 335-353
Author(s):  
Nathalie Cheminet ◽  
Sandra L. Nogueira ◽  
Oumayma Benaqqa ◽  
Zakaria El Malki ◽  
Mohamed Bourass ◽  
...  
Keyword(s):  
Small Molecules ◽  
Band Gap ◽  
Building Block ◽  
Experimental Methods ◽  
Electronic Contribution ◽  
Absorption Properties ◽  
Conjugated Molecules ◽  
Low Band Gap ◽  
Conjugated Systems ◽  
Donor Acceptor

AbstractIn order to understand the electronic contribution of the thienopyrazine building block on the electronic properties of π-conjugated systems, small molecules containing thiophene and thienopyrazine moieties are synthesized and jointly studied by theoretical (DFT) and experimental methods (UV-Vis, UPS). Taking advantages of these preliminar attractive results, four low band gap extended structures have been elaborated on the base of Donor-Acceptor-Donor sequences (DAD); these elongated π-conjugated molecules exhibit noticeable electronic and absorption properties spreading from the near UV to NIR regions.

Solvation and redox properties of [Co(en)3]3+-[Co(en)3]2+ system

1980 ◽  
Vol 45 (2) ◽  
pp. 335-338 ◽  
Author(s):  
Adéla Kotočová ◽  
Ulrich Mayer
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Specific Interaction ◽  
Redox Properties ◽  
Solvation Effect ◽  
Interacting Particles ◽  
Acid Base ◽  
Polar Solvents ◽  
Oxidation Reduction ◽  
Solvent Molecules

The solvation effect of a number of nonaqueous polar solvents was studied on the oxidation-reduction properties of the [Co(en)3]3+-[Co(en)3]2+ system. Interactions of these ions with the solvent molecules are discussed in terms of their coordination, which is accompanied by a specific interaction of the Lewis acid-base type, namely formation of a hydrogen bond between the interacting particles. This is the main controlling factor of the redox properties of the studied system.

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