Phthalocyanine-based discotic liquid crystals switching from a molten alkyl chain type to a flying-seed-like type

Abstract

A series of phthalocyanine-based derivatives (m-CnOPhO)8PcCu (n= 1–20:2a–o) show two different types of mesomorphism: a flying-seed-like type forn= 1–5, a conventional molten alkyl chain type forn= 10–20, and both types forn= 6–9 in between.

Synthesis, Spectral and Magnetic Susceptibility Studies of 1,8,15,22- Tetraiodophthalocyanine Complexes of Cobalt, Nickel, Copper and Zinc

“…Most of the physicochemical properties of the phthalocyanine complexes depends on the functionalization of the phthalocyanine molecules on the peripheral carbon atoms and the consequent variation in electron charge cloud on the phalocyanine plane. Applications of the peripherally substituted phthalocyanine complexes encompasses dyes and pigments [1][2][3][4][5], materials for solar cells [6][7][8], fuel cell electrodes [9,10], electrochromic display devices [11][12][13][14], photochromic display devices [15,16], data storage devices [17][18][19], liquid crystal color display devices [20,21] and materials for photodynamic cancer therapy [22][23][24]. Peripherally substituted cobalt phthalocyanine complexes in particular are used as catalyst for electrochemical biosensors and sensors for atmospheric pollutants [25][26][27].…”

Antifungal Activity and Staining Properties of Some Symmetrically Functionalized Metal Phthalocyanine Dyes

“…Metal phthalocyanine complexes are very interesting class of bluish green coloured nontoxic materials in which the electronic environment around the metal is similar to that of biologically important molecules like haemin and chlorophyll [1]. The electronic structure and redox properties of the metal phthalocyanines made them applicable as industrial dyes and pigments [1][2][3][4][5], electrochemical catalysts [2,[6][7], materials for solar cells [8][9][10], thermally stable fuel cell electrodes [11][12], electrochromic display devices [13][14][15][16], photochromic display devices [17][18], data storage devices [19][20][21] and liquid crystal colour display devices [22][23]. Demonstration of the use of water soluble metal phthalocyanine derivatives as potential photosensitizers for photodynamic cancer therapy was considered as an important application of metal phthalocyanine complexes in biology and medicine [24][25][26][27].…”

Tetra-4-(4’-Меthоxyphenoxy)Phthalocyanine Copper Complex: Synthesis, Mesomorphism, Spectral and Photophysical Properties of Thin Films

“…Однако дальнейшие исследования показали, что и другие заместители могут придать фталоцианиновым молекулам мезоморфные свойства. Так, окта-4,5-замещенные фталоцианинаты меди, в том числе содержащие метоксифенокси-заместители, проявляют мезоморфизм [16][17][18][19][20]. Подобные молекулярные структуры были отнесены к группе «flying seed-like» мезогенов.…”