5-(2-Methyl-3-furyl)-4-phenyl-2,4-dihydro-3H-1,2,4-triazole-3-thione
CAS Number:
346464-59-3
Molecular Formula:
C13H11N3OS
Modeling ultrasound-induced molecular weight decrease of polymers with multiple scissile azo-mechanophores
Literature Information
Publication Date
2021-06-22
DOI
10.1039/D1PY00420D
Impact Factor
5.582
Authors
Mathieu A. Ayer, Cheyenne H. Liu, Christoph Weder
View Original
Abstract
The azo moiety is receiving increasing attention as a stimuli-responsive trigger. Herein, we present an investigation of the mechanoresponsive behavior of a series of polyurethanes containing multiple randomly distributed azo motifs as scissile mechanophores, i.e., an entity that is preferentially cleaved upon application of a mechanical force. We made a systematic comparison of the ultrasound-induced cleavage of azo-containing polymers of different molecular weights and with varying azo content. We developed a mathematical model to describe the scission kinetics and the analysis of the rate constants showed that site-specific cleavage at the azo position was favored over random bond scission events. The proposed mathematical model appears to be a broadly useful method to characterize the ultrasound-induced molecular weight decrease of polymers containing multiple scissile mechanophores.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
7.3%
Articles per Year:
457
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Recommended Compounds
![Ethyl 4-[8-chloro(5,5,6,6,7-~2~H_5_)-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene]-1-piperidinecarboxylate structure](https://static.chemtradehub.com/structs/102/1020719-57-6-37e2.webp "Ethyl 4-[8-chloro(5,5,6,6,7-~2~H_5_)-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene]-1-piperidinecarboxylate structure")
Ethyl 4-[8-chloro(5,5,6,6,7-~2~H_5_)-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene]-1-piperidinecarboxylate
CAS Number:
1020719-57-6
Molecular Formula:
C22H18D5ClN2O2
![5,10-Dihydroindeno[2,1-a]indene structure](https://static.chemtradehub.com/structs/654/6543-29-9-71ca.webp "5,10-Dihydroindeno[2,1-a]indene structure")
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