SYNTHESIS OF ZINC-SULFIDE CLUSTERS AND ZINC PARTICLES WITHIN MICROPHASE-SEPARATED DOMAINS OF ORGANOMETALLIC BLOCK-COPOLYMERS

被引：96

作者：

SANKARAN, V

YUE, J

COHEN, RE

SCHROCK, RR

SILBEY, RJ

机构：

[1] MIT,DEPT CHEM ENGN,CAMBRIDGE,MA 02139

[2] MIT,DEPT CHEM,CAMBRIDGE,MA 02139

来源：

CHEMISTRY OF MATERIALS | 1993年 / 5卷 / 08期

关键词：

D O I：

10.1021/cm00032a017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Block copolymers of methyltetracyclododecene (MTD) and bTAN(ZnPh)2 [where bTAN = 2,3-trans-bis((tert-butylamido)methyl)norborn-5-ene] were prepared via ring-opening metathesis polymerization. Microphase-separated films of these copolymers exhibiting either lamellar or spherical morphology were reacted with hydrogen sulfide yielding zine sulfide (ZnS) clusters within the organometallic domains. Clusters with diameters up to 30 angstrom were prepared and characterized by X-ray diffraction and electron microscopy. The effects of processing parameters such as temperature, copolymer morphology, and the presence of coordinating bases on cluster size were investigated, and the results were explained on basis of nucleation theory. Investigation of these clusters by X-ray photoelectron spectroscopy (XPS) revealed a distinct increase in their band-edge separation (5.7 eV for 30-angstrom clusters) relative to the bulk ZnS bandgap (3.5 eV) indicative of quantum size effects. Also investigated was the formation of zinc particles and clusters by thermal treatment of the block copolymer films.

引用

页码：1133 / 1142

页数：10

共 56 条

[11] SYNTHESIS OF NORBORNENES CONTAINING TIN(II), TIN(IV), LEAD(II), AND ZINC(II) AND THEIR POLYMERIZATION TO GIVE MICROPHASE-SEPARATED BLOCK COPOLYMERS [J].