Qin, YongnianMcArthur, Colin R.Leznoff, Clifford C.2010-12-202010-12-201993Can J. Chem., 1993, 71, 1319-1326.http://hdl.handle.net/10315/6437enPhthalocyanine Modified Silica Gels and Their Application in the Purification of Unsymmetrical PhthalocyaninesArticlehttp://article.pubs.nrc-cnrc.gc.ca/ppv/RPViewDoc?issn=1480-3291&volume=71&issue=9&startPage=1319