MOTIONAL HETEROGENEITY AND POLYMORPHISM OF BISPHENOL-A DIACETATE

被引：6

作者：

CASARINI, D ^{[1
]}

HARRIS, RK ^{[1
]}

KENWRIGHT, AM ^{[1
]}

机构：

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

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 1993年 / 31卷 / 06期

关键词：

C-13; NMR; C-13 CP MAS; MOTIONAL HETEROGENEITY; POLYMORPHISM; BISPHENOL-A DIACETATE;

D O I：

10.1002/mrc.1260310605

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two polymorphs of bisphenol-A diacetate 12,2-bis(p-acetoxyphenyl)propane] were characterized by solid-state C-13 cross-polarization magic-angle spinning NMR, X-ray powder diffraction and differential scanning calorimetic measurements. The structure of one polymorph was determined by single-crystal x-ray diffraction methods, and shown to have two molecules in the asymmetric unit. The two polymorphs show markedly different molecular mobilities, as reflected in variable-temperature solid-state NMR measurements, with one polymorph exhibiting motional heterogeneity in the flipping of the phenylene rings.

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页码：540 / 547

页数：8

相关论文

共 26 条

[1] BROAD-LINE NMR-STUDIES OF MOLECULAR-MOTION IN CURED EPOXY-RESINS [J].

BANKS, L ;

ELLIS, B .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1982, 20 (06) :1055-1067

[2] P-31 MAS NMR OF P4S3 - CRYSTALLINE-TO-PLASTIC PHASE-TRANSITION INDUCED BY MAS IN A DOUBLE AIR-BEARING STATOR [J].

BJORHOLM, T ;

JAKOBSEN, HJ .

JOURNAL OF MAGNETIC RESONANCE, 1989, 84 (01) :204-211

[3] VARIABLE-TEMPERATURE HIGH-RESOLUTION C-13 STUDIES OF MOLECULAR-MOTION IN SOLID BISPHENOL-F DIGLYCIDYL ETHER [J].

CASARINI, D ;

HARRIS, RK ;

KENWRIGHT, AM .

MAGNETIC RESONANCE IN CHEMISTRY, 1992, 30 (05) :434-439

[4] PROTON AND C-13 RELAXATION AND MOLECULAR-MOTION IN GLASSY BISPHENOL-A POLYCARBONATE [J].

CONNOLLY, JJ ;

INGLEFIELD, PT ;

JONES, AA .

JOURNAL OF CHEMICAL PHYSICS, 1987, 86 (12) :6602-6615

[5] INVESTIGATION OF MOLECULAR MOTIONS IN A DERIVATIVE OF BISPHENOL-A DIGLYCIDYL ETHER BY VARIABLE-TEMPERATURE HIGH-RESOLUTION SOLID-STATE C-13 NMR [J].

EVERATT, B ;

HARRIS, RK ;

KENWRIGHT, AM ;

PACKER, KJ ;

STARK, BP .

MAGNETIC RESONANCE IN CHEMISTRY, 1987, 25 (01) :80-83

[6] DETERMINATION OF CROSS-LINK DENSITY IN THERMOSET POLYMERS BY USE OF SOLID-STATE H-1-NMR TECHNIQUES [J].

FRY, CG ;

LIND, AC .

MACROMOLECULES, 1988, 21 (05) :1292-1297

[7] SOME MOLECULAR MOTIONS IN EPOXY POLYMERS - A C-13 SOLID-STATE NMR-STUDY [J].

GARROWAY, AN ;

RITCHEY, WM ;

MONIZ, WB .

MACROMOLECULES, 1982, 15 (04) :1051-1063

[8] MOLECULAR-MOTION IN A CRYSTALLINE ANALOG OF BISPHENOL-A POLYCARBONATE [J].

HENRICHS, PM ;

LUSS, HR ;

SCARINGE, RP .

MACROMOLECULES, 1989, 22 (06) :2731-2742

[9] AN EXPERIMENTAL-DETERMINATION OF THE LOCAL CHAIN CONFORMATION OF BISPHENOL-A POLYCARBONATE [J].

HENRICHS, PM ;

NICELY, VA .

MACROMOLECULES, 1990, 23 (12) :3193-3194

[10]

KAPLAN JI, 1992, J MAGN RESON, V49, P464