Poly(propyleneimine) dendrimers peripherally modified with mesogens

Citation
K. Yonetake et al., Poly(propyleneimine) dendrimers peripherally modified with mesogens, MACROMOLEC, 32(20), 1999, pp. 6578-6586
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULES
ISSN journal
0024-9297 → ACNP
Volume
32
Issue
20
Year of publication
1999
Pages
6578 - 6586
Database
ISI
SICI code
0024-9297(19991005)32:20<6578:PDPMWM>2.0.ZU;2-W
Abstract
Poly(propyLeneimine)-based Liquid crystalline dendrimers (PPILCDs) with a r elatively flexible dendritic scaffold were successfully prepared by the Mic hael addition reaction of poly(propyleneimine)s with omega-(4'-cyanobipheny loxy)alkyl acrylate (1). The structures of PPILCDs were characterized by IR spectroscopy, H-1 NMR spectroscopy, and MALDI-TOF mass spectroscopy. PPILC Ds exhibit smectic liquid crystalline natures between -7 and +89 degrees C. The temperature range of the smectic phases expanded with increases in the generation of the dendritic core and the length of flexible spacers. The h omeotropic orientation was allowed to take place in PPILCD with the second- generation scaffold, when it was slowly cooled.