VARIABLE-TEMPERATURE HIGH-RESOLUTION C-13 STUDIES OF MOLECULAR-MOTION IN SOLID BISPHENOL-F DIGLYCIDYL ETHER

被引：14

作者：

CASARINI, D

HARRIS, RK

KENWRIGHT, AM

机构：

[1] UNIV DURHAM,DEPT CHEM,SOUTH RD,DURHAM DH1 3LE,ENGLAND

[2] UNIV BOLOGNA,DEPT ORGAN CHEM,I-40126 BOLOGNA,ITALY

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 1992年 / 30卷 / 05期

关键词：

MAGIC-ANGLE SPINNING; MOLECULAR MOTION; PHASE CHANGES;

D O I：

10.1002/mrc.1260300515

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Variable-temperature cross-polarization magic-angle spinning solid-state C-13 NMR spectra of bisphenol-F diglycidyl ether were obtained in the temperature range 25-67-degrees-C. Dynamic phenomena are observed, and the experimental data are in accord with an inhomogeneous distribution of correlation times, perhaps related to a second-order phase change. Single-pulse excitation experiments under comparable conditions confirmed the presence of motional inhomogeneity, characterized by a fraction of mobile molecules within the sample. Differential scanning calorimetric measurements revealed a phase transition at ca. 50-degrees-C.

引用

页码：434 / 439

页数：6

共 32 条

[1]

AKSNES DW, 1991, MAGN RESONANCE CHEM, V24, P698

[2] STEREOCHEMICAL STUDIES OF OLIGOMERS .26. BIS[4-(4-AMINOPHENOXY)PHENYL]-DIMETHYLMETHANE [J].