Indexed by:期刊论文

Date of Publication:2011-07-01

Journal:JOURNAL OF SOLID STATE CHEMISTRY

Included Journals:Scopus、SCIE、EI

Volume:184

Issue:7

Page Number:1666-1670

ISSN No.:0022-4596

Key Words:Borate; Luminescence; White-light-emission

Abstract:A new organically templated pentaborate [C6N4H20](0.5)[B5O6(OH)(4)] (la) was prepared by reactions of triethylenetetramine (TETA) with excess boric acid in aqueous solution and characterized by elemental analysis, FTIR, TG-DTA, powder X-ray diffraction and photoluminescence spectroscopy. The structure of la was determined by a single-crystal X-ray diffraction. It crystallizes in the monoclinic system with space group P2(1)/c, a=9200(3) angstrom, b=14.121(5) angstrom, c=10.330(4) angstrom, beta=91.512(4)degrees, V=1341.4(9) angstrom(3), and Z=4. The luminescent properties of the compound were studied, and a green-blue luminescence occurs with an emission maximum at 507 nm upon excitation at 430 nm. The photoluminescence of la can be modified from green-blue to white by means of a simple heat-treatment process. The white-light-emission of sample 1c makes the pentaborate a good candidate for display and lighting applications in the white LED. (C) 2011 Elsevier Inc. All rights reserved.