NDLI: On thermal stability of polydiphenylenesulfophthalide lithium salt

Content Provider	Springer Nature Link
Author	Shishlov, N. M. Akhmetzyav, Sh. S. Khursan, S. L.
Copyright Year	2016
Abstract	Thermolysis of polytriarylcarbinol (PTAC-Li) (lithium salt of polydiphenylenesulfophthalide (PDSP)) was studied in the temperature range from 100 to 500 °С by thermogravimetric analysis (TG) and IR and electronic spectroscopy to check the available data on the higher thermal stability of PDSP salts over the initial polymer. The mass losses detected by the TG method in the polymer salt at 80—150 and 240—350 °С are mainly caused by the desorption of weakly and strongly bound water. According to the calculations in the B3LYP/6-311+G(d,p) approximation, the С—ОН and C—SO 3 - Li$^{+}$ bonds are weakest in the carbinol model for PTAC-Li (D(C—O) ~ D(C—S) ~ 72 kcal mol$^{–1}$). The thermolysis of PDSP is accompanied by SO$_{2}$ evolution, whereas hydroxy and sulfo groups detached from PTAC-Li macromolecules remain in the thermolyzate. Phenol fragments and an inorganic phase, the final form of which is lithium sulfate, are formed in this process. An analysis of the IR and UV spectra of the thermolyzates of PTAC-Li and PDSP confirmed that fluorenyl fragments are predominantly formed upon the thermolysis of these polymers. The data obtained do not confirm a higher stability of PTAC-Li compared to that of PDSP.
Starting Page	2437
Ending Page	2443
Page Count	7
File Format	PDF
ISSN	10665285
Journal	Russian Chemical Bulletin
Volume Number	65
Issue Number	10
e-ISSN	15739171
Language	English
Publisher	Springer US
Publisher Date	2017-05-06
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	polytriarylcarbinol polydiphenylenesulfophthalide thermolysis radicals dissociation energies IR spectra electronic spectra DFT calculations Chemistry/Food Science Organic Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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