Citation: Xiao Zhen YANG, Qun LU, Ye CHAI, Shan Nong ZHU, Fu Zhou WU, Rong Ben ZHANG, Ying Yan JIANG. CONFORMATIONAL CHANGE IN MESOGENIC CORES OF DISCOTIC LIQUID CRYSTALS[J]. Chinese Chemical Letters, ;1992, 3(2): 123-126. shu

CONFORMATIONAL CHANGE IN MESOGENIC CORES OF DISCOTIC LIQUID CRYSTALS

a Polymer Physics Laboratory, Institute of Chemistry, Academia Sinica, Beijing 100080;
b Functional Polymer Laboratory Institute of Chemistry, Academia Sinica, Beijing 100080

Received Date: 4 October 1991

Fund Project: This work has been supported by a grant from the director of Institute of Chemistry, Academia Sinica, and a grant from Polymer Physics Laboratory, Academia Sinica, No.89-B-25.

Infrared spectra of bis (β-diketonato) copper (Ⅱ) complex liquid crystals with different flexible chain lengths (the carbon number=12 and 14) have been studied as a function of temperature. Conformational changes in mesogenic cores of the molecules have been characterized by using the out-of-plane bending vibration mode of aromatic C-H bonds. The result shows that for the phenylene rings and the chelate rings of the molecules there occurred an enhancement of extended conjugation of the two π-electron systems during phase transitions, which was also supported by UV measurements. It suggests that the big quasi-planar core structure in the discotic complex consisted of four phenylene rings and the central chelate rings is not maintained in every phase.
1. [1]
  Weiyu Chen , Zenghui Li , Chenguang Zhao , Lisha Zha , Junfeng Shi , Dan Yuan . Enzyme-modulate conformational changes in amphiphile peptide for selectively cell delivery. Chinese Chemical Letters, 2024, 35(12): 109628-. doi: 10.1016/j.cclet.2024.109628
2. [2]
  Yutong Xiong , Ting Meng , Wendi Luo , Bin Tu , Shuai Wang , Qingdao Zeng . Molecular conformational effects on co-assembly systems of low-symmetric carboxylic acids investigated by scanning tunneling microscopy. Chinese Journal of Structural Chemistry, 2025, 44(2): 100511-100511. doi: 10.1016/j.cjsc.2025.100511
3. [3]
  Shaonan Tian , Yu Zhang , Qing Zeng , Junyu Zhong , Hui Liu , Lin Xu , Jun Yang . Core-shell gold-copper nanoparticles: Evolution of copper shells on gold cores at different gold/copper precursor ratios. Chinese Journal of Structural Chemistry, 2023, 42(11): 100160-100160. doi: 10.1016/j.cjsc.2023.100160
4. [4]
  Tong Zhang , Xiaojing Liang , Licheng Wang , Shuai Wang , Xiaoxiao Liu , Yong Guo . An ionic liquid assisted hydrogel functionalized silica stationary phase for mixed-mode liquid chromatography. Chinese Chemical Letters, 2025, 36(1): 109889-. doi: 10.1016/j.cclet.2024.109889
5. [5]
  Xin Dong , Jing Liang , Zhijin Xu , Huajie Wu , Lei Wang , Shihai You , Junhua Luo , Lina Li . Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection. Chinese Chemical Letters, 2024, 35(6): 108708-. doi: 10.1016/j.cclet.2023.108708
6. [6]
  Jaeyong Ahn , Zhenping Li , Zhiwei Wang , Ke Gao , Huagui Zhuo , Wanuk Choi , Gang Chang , Xiaobo Shang , Joon Hak Oh . Surface doping effect on the optoelectronic performance of 2D organic crystals based on cyano-substituted perylene diimides. Chinese Chemical Letters, 2024, 35(9): 109777-. doi: 10.1016/j.cclet.2024.109777
7. [7]
  Jiajing Wu , Ru-Ling Tang , Sheng-Ping Guo . Three types of promising functional building units for designing metal halide nonlinear optical crystals. Chinese Journal of Structural Chemistry, 2024, 43(6): 100291-100291. doi: 10.1016/j.cjsc.2024.100291
8. [8]
  Hongxia Li , Xiyang Wang , Du Qiao , Jiahao Li , Weiping Zhu , Honglin Li . Mechanism of nanoparticle aggregation in gas-liquid microfluidic mixing. Chinese Chemical Letters, 2024, 35(4): 108747-. doi: 10.1016/j.cclet.2023.108747
9. [9]
  Jie Wu , Xiaoqing Yu , Guoxing Li , Su Chen . Engineering particles towards 3D supraballs-based passive cooling via grafting CDs onto colloidal photonic crystals. Chinese Chemical Letters, 2024, 35(4): 109234-. doi: 10.1016/j.cclet.2023.109234
10. [10]
  Jingyu Chen , Sha Wu , Yuhao Wang , Jiong Zhou . Near-perfect separation of alicyclic ketones and alicyclic alcohols by nonporous adaptive crystals of perethylated pillar[5]arene and pillar[6]arene. Chinese Chemical Letters, 2025, 36(4): 110102-. doi: 10.1016/j.cclet.2024.110102
11. [11]
  Ziyi Liu , Feifei Guo , Tingting Cao , Youxuan Sun , Xutang Tao , Zeliang Gao . High thermal conductivity in Ga2TeO6 crystals: Synergistic effects of rigid polyhedral frameworks and stereochemically inert cations. Chinese Journal of Structural Chemistry, 2025, 44(4): 100544-100544. doi: 10.1016/j.cjsc.2025.100544
12. [12]
  Tian Feng , Yun-Ling Gao , Di Hu , Ke-Yu Yuan , Shu-Yi Gu , Yao-Hua Gu , Si-Yu Yu , Jun Xiong , Yu-Qi Feng , Jie Wang , Bi-Feng Yuan . Chronic sleep deprivation induces alterations in DNA and RNA modifications by liquid chromatography-mass spectrometry analysis. Chinese Chemical Letters, 2024, 35(8): 109259-. doi: 10.1016/j.cclet.2023.109259
13. [13]
  Haoyang Wang , Ronghao Zhang , Yanlun Ren , Li Zhang . A convenient method for measuring gas-liquid volumetric mass transfer coefficient in micro reactors. Chinese Chemical Letters, 2024, 35(4): 108833-. doi: 10.1016/j.cclet.2023.108833
14. [14]
  Wangyan Hu , Ke Li , Xiangnan Dou , Ning Li , Xiayan Wang . Nano-sized stationary phase packings retained by single-particle frit for microchip liquid chromatography. Chinese Chemical Letters, 2024, 35(4): 108806-. doi: 10.1016/j.cclet.2023.108806
15. [15]
  Cheng Guo , Xiaoxiao Zhang , Xiujuan Hong , Yiqiu Hu , Lingna Mao , Kezhi Jiang . Graphene as adsorbent for highly efficient extraction of modified nucleosides in urine prior to liquid chromatography-tandem mass spectrometry analysis. Chinese Chemical Letters, 2024, 35(4): 108867-. doi: 10.1016/j.cclet.2023.108867
16. [16]
  Yang Li , Yihan Chen , Jiaxin Luo , Qihuan Li , Yiwu Quan , Yixiang Cheng . Enhanced circularly polarized luminescence emission promoted by achiral dichroic oligomers of F8BT in cholesteric liquid crystal. Chinese Chemical Letters, 2024, 35(11): 109864-. doi: 10.1016/j.cclet.2024.109864
17. [17]
  Yuqing Ding , Zhiying Yi , Zhihui Wang , Hongyu Chen , Yan Zhao . Liquid nitrogen post-treatment for improved aggregation and electrical properties in organic semiconductors. Chinese Chemical Letters, 2024, 35(12): 109918-. doi: 10.1016/j.cclet.2024.109918
18. [18]
  Jianwen Zhao , Shuai Wang , Shanshan Zhao , Liwei Chen , Fangang Meng , Xuelin Tian . A non-fluorinated liquid-like membrane with excellent anti-scaling performance for membrane distillation. Chinese Chemical Letters, 2025, 36(1): 109883-. doi: 10.1016/j.cclet.2024.109883
19. [19]
  Jiajia Wang , XinXin Ge , Yajing Xiang , Xiaoliang Qi , Ying Li , Hangbin Xu , Erya Cai , Chaofan Zhang , Yulong Lan , Xiaojing Chen , Yizuo Shi , Zhangping Li , Jianliang Shen . An ionic liquid functionalized sericin hydrogel for drug-resistant bacteria-infected diabetic wound healing. Chinese Chemical Letters, 2025, 36(2): 109819-. doi: 10.1016/j.cclet.2024.109819
20. [20]
  Mengchen Liu , Yufei Zhang , Yi Xiao , Yang Wei , Meichen Bi , Huaide Jiang , Yan Yu , Shenghong Zhong . High stretchability and toughness of liquid metal reinforced conductive biocompatible hydrogels for flexible strain sensors. Chinese Journal of Structural Chemistry, 2025, 44(3): 100518-100518. doi: 10.1016/j.cjsc.2025.100518

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(533)
HTML views(0)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return