Citation: . TEMPERATURE DEPENDENCE OF THE FLUORESCENCE SPECTRA OF LADDERLIKE POLYPHENYLSILSESQUIOXANE AND LADDERLIKE 1,4-PHENYLENE-BRIDGED POLYVINYLSILOXANE*[J]. Chinese Journal of Polymer Science, ;2002, 20(1): 15-23. shu

TEMPERATURE DEPENDENCE OF THE FLUORESCENCE SPECTRA OF LADDERLIKE POLYPHENYLSILSESQUIOXANE AND LADDERLIKE 1,4-PHENYLENE-BRIDGED POLYVINYLSILOXANE*

Received Date: 5 February 2001
Revised Date: 27 March 2001

Fluorescence spectra of ladderlike polyphenylsilsesquioxane (LPPS) and ladderlike 1,4-phenylene-bridgedpolyvinylsiloxane (LPPVS) have been measured as a function of temperature (4-55℃), in dilute tetrahydrofuran solution.The excimer (IE) to monomer (IM) intensity ratio (IE/IM) of LPPS dilute solution shows a double linear Arrhenius plot with abreak point ascribable to a transition temperature Tt This behavior has not been found for single chain polyorganosiloxanes.When lnIE of LPPS was plotted against 1/T,it also gave a double linear plot with one break point,which was found in single chain polyorganosiloxanes.The different behaviors between LPPS and single chain polyorganosiloxanes may be mainly attributed to the relatively rigid double-chain macromolecular backbone of LPPS.However,the ln(IE/IM) of dilute LPPVS solution versus 1/T shows a simple linear variation with a positive slope which confirms our proposition.The difference between the fluorescence results of LPPS and those of LPPVS may possibly derive from their structure difference and cooperative motion in backbone chain bonds.
1. [1]
  Zhiwei Chen , Heyun Sheng , Xue Li , Menghan Chen , Xin Li , Qiuling Song . Efficient capture of difluorocarbene by pyridinium 1,4-zwitterionic thiolates: A concise synthesis of difluoromethylene-containing 1,4-thiazine derivatives. Chinese Chemical Letters, 2024, 35(4): 108937-. doi: 10.1016/j.cclet.2023.108937
2. [2]
  Wujun Jian , Mong-Feng Chiou , Yajun Li , Hongli Bao , Song Yang . Cu-catalyzed regioselective diborylation of 1,3-enynes for the efficient synthesis of 1,4-diborylated allenes. Chinese Chemical Letters, 2024, 35(5): 108980-. doi: 10.1016/j.cclet.2023.108980
3. [3]
  Yan-Li Li , Zhi-Ming Li , Kai-Kai Wang , Xiao-Long He . Beyond 1,4-addition of in-situ generated (aza-)quinone methides and indole imine methides. Chinese Chemical Letters, 2024, 35(7): 109322-. doi: 10.1016/j.cclet.2023.109322
4. [4]
  Qi Li , Zi-Lu Wang , Yun-He Xu . Copper-catalyzed 1,4-silylcyanation of 1,3-enynes: A silyl radical-initiated approach for synthesis of difunctionalized allenes. Chinese Chemical Letters, 2025, 36(3): 109991-. doi: 10.1016/j.cclet.2024.109991
5. [5]
  Liangfeng Yang , Liang Zeng , Yanping Zhu , Qiuan Wang , Jinheng Li . Copper-catalyzed photoredox 1,4-amidocyanation of 1,3-enynes with N-amidopyridin-1-ium salts and TMSCN: Facile access to α-amido allenyl nitriles. Chinese Chemical Letters, 2024, 35(11): 109685-. doi: 10.1016/j.cclet.2024.109685
6. [6]
  Huan Hu , Ying Zhang , Shi-Shuang Huang , Zhi-Gang Li , Yungui Liu , Rui Feng , Wei Li . Temperature- and pressure-responsive photoluminescence in a 1D hybrid lead halide. Chinese Journal of Structural Chemistry, 2024, 43(10): 100395-100395. doi: 10.1016/j.cjsc.2024.100395
7. [7]
  Keke Han , Wenjun Rao , Xiuli You , Haina Zhang , Xing Ye , Zhenhong Wei , Hu Cai . Two new high-temperature molecular ferroelectrics [1,5-3.2.2-Hdabcni]X (X = ClO₄⁻, ReO₄⁻). Chinese Chemical Letters, 2024, 35(6): 108809-. doi: 10.1016/j.cclet.2023.108809
8. [8]
  Feihu Wu , Gengwen Chen , Kaitao Lai , Shiqing Zhang , Yingchao Liu , Ruijian Luo , Xiaocong Wang , Pinzhi Cao , Yi Ye , Jiarong Lian , Junle Qu , Zhigang Yang , Xiaojun Peng . Non-specific/specific SERS spectra concatenation for precise bacteria classifications with few samples using a residual neural network. Chinese Chemical Letters, 2025, 36(1): 109884-. doi: 10.1016/j.cclet.2024.109884
9. [9]
  Yan Cheng , Hai-Quan Yao , Ya-Di Zhang , Chao Shi , Heng-Yun Ye , Na Wang . Nitrate-bridged hybrid organic-inorganic perovskites. Chinese Journal of Structural Chemistry, 2024, 43(9): 100358-100358. doi: 10.1016/j.cjsc.2024.100358
10. [10]
  Yanbing Shen , Yuan Yuan , Yaxin Wang , Xiaonan Ma , Wensheng Yang , Yulan Chen . Dihydroanthracene bridged bis-naphthopyrans: A multimodal chromophore with mechano- and photo-chromic properties. Chinese Chemical Letters, 2024, 35(5): 108949-. doi: 10.1016/j.cclet.2023.108949
11. [11]
  Hui-Juan Wang , Wen-Wen Xing , Zhen-Hai Yu , Yong-Xue Li , Heng-Yi Zhang , Qilin Yu , Hongjie Zhu , Yao-Yao Wang , Yu Liu . Cucurbit[7]uril confined phenothiazine bridged bis(bromophenyl pyridine) activated NIR luminescence for lysosome imaging. Chinese Chemical Letters, 2024, 35(6): 109183-. doi: 10.1016/j.cclet.2023.109183
12. [12]
  Dan Luo , Jinya Tian , Jianqiao Zhou , Xiaodong Chi . Anthracene-bridged "Texas-sized" box for the simultaneous detection and uptake of tryptophan. Chinese Chemical Letters, 2024, 35(9): 109444-. doi: 10.1016/j.cclet.2023.109444
13. [13]
  Jing Wang , Zenghui Li , Xiaoyang Liu , Bochao Su , Honghong Gong , Chao Feng , Guoping Li , Gang He , Bin Rao . Fine-tuning redox ability of arylene-bridged bis(benzimidazolium) for electrochromism and visible-light photocatalysis. Chinese Chemical Letters, 2024, 35(9): 109473-. doi: 10.1016/j.cclet.2023.109473
14. [14]
  Lina Wang , Hairu Wang , Qian Bu , Qiong Mei , Junbo Zhong , Bo Bai , Qizhao Wang . Al-O bridged NiFeO_x/BiVO₄ photoanode for exceptional photoelectrochemical water splitting. Chinese Chemical Letters, 2025, 36(4): 110139-. doi: 10.1016/j.cclet.2024.110139
15. [15]
  Dian-Xue Ma , Yu-Wu Zhong . Achieving highly-efficient room-temperature phosphorescence with a nylon matrix. Chinese Journal of Structural Chemistry, 2024, 43(9): 100391-100391. doi: 10.1016/j.cjsc.2024.100391
16. [16]
  Deshuai Zhen , Chunlin Liu , Qiuhui Deng , Shaoqi Zhang , Ningman Yuan , Le Li , Yu Liu . A review of covalent organic frameworks for metal ion fluorescence sensing. Chinese Chemical Letters, 2024, 35(8): 109249-. doi: 10.1016/j.cclet.2023.109249
17. [17]
  Gongcheng Ma , Qihang Ding , Yuding Zhang , Yue Wang , Jingjing Xiang , Mingle Li , Qi Zhao , Saipeng Huang , Ping Gong , Jong Seung Kim . Palladium-free chemoselective probe for in vivo fluorescence imaging of carbon monoxide. Chinese Chemical Letters, 2024, 35(9): 109293-. doi: 10.1016/j.cclet.2023.109293
18. [18]
  Ying Xu , Chengying Shen , Hailong Yuan , Wei Wu . Mapping multiple phases in curcumin binary solid dispersions by fluorescence contrasting. Chinese Chemical Letters, 2024, 35(9): 109324-. doi: 10.1016/j.cclet.2023.109324
19. [19]
  Yuxin Li , Chengbin Liu , Qiuju Li , Shun Mao . Fluorescence analysis of antibiotics and antibiotic-resistance genes in the environment: A mini review. Chinese Chemical Letters, 2024, 35(10): 109541-. doi: 10.1016/j.cclet.2024.109541
20. [20]
  Ziyou Zhang , Te Ji , Hongliang Dong , Zhiqiang Chen , Zhi Su . Effect of coordination restriction on pressure-induced fluorescence evolution. Chinese Chemical Letters, 2024, 35(12): 109542-. doi: 10.1016/j.cclet.2024.109542

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(540)
HTML views(2)

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