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Compounds consisting of coplanar π-conjugated B_(3)O_(6)-typed structures:An emerging source of ultraviolet nonlinear optical materials

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Chinese Journal of Structural Chemistry 2023年第1期42卷 64-73页

作者： Lingli Wu Huixin Fan Chensheng Lin Min Luo Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China University of the Chinese Academy of Sciences Beijing100049China

Nonlinear optical(NLO)materials as a crucial part of the laser science have attracted increasing attention from researchers because of their wide applications in information storages,modern science and technologies,et *** on the anionic group theory,theπ-conjugated 6-membered rings(6-MRs),B_(3)O_(6)-typed structures have key contributions to the superior optical properties ofβ-Ba_(2)B_(2)O_(4)(β-BBO).In recent years,the organic coplanarπ-conjugated B_(3)O_(6)-typed structures have caught researchers'attention due to similar configurations to the(B_(3)O_(6))groups,which are the potential sources for expending the(B_(3)O_(6))groups with outstanding optical *** to know,researchers have obtained many ultraviolet(UV)NLO crystals with excellent properties withπ-conju-gated B_(3)O_(6)-typed ***,these B_(3)O_(6)-typed groups could be divided into different categories according to the atoms constituting the 6-MRs:(H_(x)C_(3)N_(3)O_(3))^(x-3)(x=0-3)(cyanurate ion),(H_(x)C_(4)N_(2)O_(3))^(x-4)(x=2,3)(barbi-turate ion),(C_(3)H_(7)N_(6))^(+)(melamine ion),(C_(5)H_(6)ON)^(+)(4-hydroxypyridine cation),and(C_(4)H_(6)N_(3))^(+)(2-amino-pyrimidinium cation).In this review,we introduced the research advances of NLO materials withπ-conjugated B_(3)O_(6)-typed groups,and summarized the crystal structures,synthetic methods,optical performances,as well as the relationships between structures and *** work provided a clear perspective for understanding the coplanarπ-conjugated B_(3)O_(6)-typed groups with their optical functional properties and promote the searches to develop potential NLO functional crystals.

关键词： NLO crystals B_(3)O_(6)-typed structures π-conjugated Anionic group theory

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A DPP-based π-conjugated molecular:Synthesis and Characterization for ambipolar Organic field-effect transistors

A DPP-based π-Conjugated molecular:Synthesis and Characteri...

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全国第十七届大环化学暨第九届超分子化学学术研讨会

作者： Jinfeng Bai Bingzhu Yin Key Laboratory of Natural Resources of Changbai Mountain ＆Functional Molecules Yanbian UniversityMinistry of Education

＜正＞Over the past decade,extensive studies of organic field-effect transistors（OFETs）have resulted in the development of a few high-performing organic semiconducting materials.[1]Among the possibleπ-conjugated or... 详细信息

关键词： OFETs Diketopyrrolopyrroles π-conjugated

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Three New -CF3, -CN Containing <i>π</i>-conjugated Heteroaromatic Compounds: Synthesis, Crystal Structure and Photoelectronic Properties

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Crystal Structure Theory and Applications 2018年第3期7卷 33-45页

作者： Tetsuji Moriguchi Daisuke Yakeya Venkataprasad Jalli Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology Kitakyushu Japan Research and Development Division Sankar Foundation Visakhapatnam India

Three new π-conjugated hetero aromatic materials consisting of pyridine 3a, furan 3b, and thiophene 3c have been synthesized by Knoevenagel condensation reaction. These molecules have been characterized by 1H NMR, EI-MS and single crystal X-ray diffraction analysis. Molecule 3a crystallized under monoclinic system with space group C2/c, molecule 3b crystallized under triclinic system with space group P-1 and the molecule 3c crystalized under triclinic system with space group P-1. The optoelectronic properties of these compounds have been *** 3a, 3b and 3c showed strong absorption maxima wavelengths at 300, 419 and 418 nm, respectively. The molar extinction coefficients (ε) of the compounds 3a, 3b and 3c suggested that molecule 3b has better ability to absorb UV light;molecule 3a has better fluorescence intensity than molecule 3b and 3c. Low energy gaps of HOMO and LUMO energy levels of these compounds suggests that these compounds may be a promising new class of lead compounds for developing high performance semiconductor materials. Compounds 3a, 3b and 3c has emissions near to blue light, a slight modification of the structures by extending conjugation may find important applications in optoelectronic devices as blue light emitters in organic light-emitting devices for the development of new generation organic semiconducting materials.

关键词： Organic Semiconducting Material Knoevenagel Condensation X-Ray Analysis π-conjugated Materials

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A Double Helicene with Quadruple Indole-Fused Skeleton and Double NBN-Type Cove-Edged Structure

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Chinese Journal of Chemistry 2024年第23期42卷 3069-3074页

作者： Lingjuan Chen Jiaqi Dong Dehui Tan Jianfeng Wu Deng-Tao Yang Xi'an Key Laboratory of Hybrid Luminescent Materials and Photonic Device School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'anShaanxi 710072China Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan UniversityWuhan Hubei 430056China

Construction of helicenes by inducing heteroatoms has regarded as an effective strategy to enhance the chiroptical *** report a facile synthesis of a multiple helicene based on four indoles with two electron-rich NBN-coved *** structure of the NBN-coved multiple helicene was confirmed by single-crystal X-ray diffraction analysis,revealing a twisted double[5]helicene motif with a saddle-shaped *** NBN-coved helicene showed strong green fluorescence with good photoluminescence quantum *** theoretical calculations and experimental investigation have been exploited to probe the impact of electron-rich NBN units on aromaticity and photophysical properties of the helicene.

关键词： NBN Double helicene Cove-edged Indole-fused π-conjugated

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