Studies of “Pinwheel-Like” Bis[1,8,15,22-tetrakis(3-pentyloxy)phthalocyaninato] Rare Earth(III) Double-Decker Complexes

Arnold, Dennis, Biang, Yongzhong, Choi, Chi-Fung, Dou, Jianmin, Hartnell, Regan, Jiang, Jianzhuang, Li, Renjie, Ma, Changqin, Ng, Dennis, Wang, Daqi, Wang, Rongming, & Zhu, Peihua (2005) Studies of “Pinwheel-Like” Bis[1,8,15,22-tetrakis(3-pentyloxy)phthalocyaninato] Rare Earth(III) Double-Decker Complexes. Chemistry: A European Journal, 11(24), pp. 7351-7357.

View at publisher


Homoleptic bis(phthalocyaninato) rare-earth double-deckers complexes [MIII{Pc(-OC5H11)4}2] (M=Eu, Y, Lu; Pc(-OC5H11)4=1,8,15,22-tetrakis(3-pentyloxy)phthalocyaninate) have been prepared by treating the metal-free phthalocyanine H2Pc(-OC5H11)4 with the corresponding M(acac)3nH2O (acac=acetylacetonate) in refluxing n-octanol. Due to the C4h symmetry of the Pc(-OC5H11)4 ligand and the double-decker structure, all the reactions give a mixture of two stereoisomers with C4h and D4 symmetry. The former isomer, which is a major product, can be partially separated by recrystallization due to its higher crystallinity. The molecular structure of the major isomer of the Y analogue has been determined by single-crystal X-ray diffraction analysis. The metal center is eight-coordinate bound to the isoindole nitrogen atoms of the two phthalocyaninato ligands, forming a distorted square antiprism. Such an arrangement leads to an interesting “pinwheel” structure when viewed along the C4 axis, which assumes a very unusual S8 symmetry. The major isomers of all these double-deckers have also been characterized with a wide range of spectroscopic methods. A systematic investigation of their electronic absorption and electrochemical data reveals that the π–π interaction between the two Pc(-OC5H11)4 rings is weaker than that for the corresponding unsubstituted or β-substituted bis(phthalocyaninato) analogues.

Impact and interest:

43 citations in Scopus
46 citations in Web of Science®
Search Google Scholar™

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 22453
Item Type: Journal Article
Refereed: Yes
Keywords: Lanthanides, Phthalocyanines, Sandwich Complexes, Structure Elucidation, Yttrium
DOI: 10.1002/chem.200500214
ISSN: 0947-6539
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Deposited On: 17 Jun 2009 13:12
Last Modified: 07 Jul 2017 12:01

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page