Preparation and study of a lithium phthalocyanine radical: optical and magnetic properties

✍ Scribed by Philippe Turek; Jean-Jacques André; Alain Giraudeau; Jacques Simon

• Book ID: 103024748
• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 507 KB
• Volume: 134
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(87)87175-0

✦ Synopsis

A metallophthalocyanine radical, PcLi, was prepared by electrochemical oxidation of the corresponding dianion. The redox properties in solution show that PcLi is both easily reduced and easily oxidized (U?= Ee -ET2 = 0.83 V) . This property is of the utmost importance for obtaining intrinsic molecular semiconductors. The optical properties are similar to those for oxidized phthalocyanines and involve two low-lying x-x transitions at 430 and 810 nm. Despite the tendency to aggregation, the ESR spectrum of the isolated PcLi molecule has been obtained. It is consistent with an unpaired electron delocalized over the whole phthalocyanine ring.