Imaging Science and Photochemistry ›› 2000, Vol. 18 ›› Issue (4): 348-356.DOI: 10.7517/j.issn.1674-0475.2000.04.348

Previous Articles     Next Articles

MICROREACTOR-CONTROLLED SELECTIVITY IN ORGANIC PHOTOCHEMICAL REACTIONS

WU Li-zhu, ZHANG Li-ping, LI Hong-ru, YI Xiu-yu, SONG Kai, XU Ming, YUAN Zhen-yu, GUAN Jing-qu, YING Yun-ming, WANG Hong-wei, TONG Zhen-he(TUNG Chen-ho)   

  1. Institute of Photographic Chemistry, Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:2000-06-20 Revised:2000-07-03 Online:2000-11-20 Published:2000-11-20

Abstract: Molecular-sieves zeolites, Nafion membranes, low-density polyethylene films and mixed surfactant vesicles have been used as microreactors to control the product selectivity in organic photochemical reactions. The photocycloadditions of diaryl compounds with long flexible chains included in NaY zeolite or low-density polyethylene films yield intramolecular photocyclomers to the exclusion of intermolecular products. The photosensitized oxidation of alkenes included in pentasil zeolite or Nafion membrane or vesicles can be directed selectively towards either the singlet oxygen mediated or the superoxide radical anion mediated products by controlling the status and location of the substrate and sensitizer molecules in the reaction media. Long lived photoinduced charge separation in Ru(bpy)32+/viologen system at Nafion membrane solution interface was achieved.

Key words: microreactors, synthesis of large-ring compounds, photosensitized oxidation of alkenes, long-lived photo-induced charge-separation

CLC Number: