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Synthesis and Hollow‐Sphere Nanostructures of Optically Active Metal‐Free Phthalocyanine
Author(s) -
Lv Wei,
Zhang Xiaomei,
Lu Jitao,
Zhang Yuexing,
Li Xiyou,
Jiang Jianzhuang
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800546
Subject(s) - phthalocyanine , chemistry , nanostructure , bromide , x ray photoelectron spectroscopy , supramolecular chemistry , absorption spectroscopy , nanoparticle , molecule , nanoscopic scale , transmission electron microscopy , chemical engineering , nanotechnology , materials science , organic chemistry , optics , physics , engineering
Optically active metal‐free phthalocyanine ( 1 ) decorated with four octyl chains linked through binaphthyl units to the phthalocyanine ring was designed and prepared. This compound was characterized by a wide range of spectroscopic methods in addition to elemental analysis. By employing a solution injection method, both the ( R ) and ( S ) enantiomers self‐assemble into nanoparticles. Surprisingly, with the addition of a small amount of cetyltrimethylammonium bromide (CTAB), nanostructures with hollow‐sphere morphologies were formed. The hollow‐spherical structure was determined by transmission electronic microscopy and scanning electronic microscopy. X‐ray photoelectron spectroscopy together with FTIR spectra indicates the supramolecular structures formed from the metal‐free phthalocyanine molecules. Low‐angle X‐ray diffraction reveals the stacked phthalocyanine molecules with a face‐to‐face configuration in the nanoscale hollow spheres formed with the help of CTAB surfactant. The formation of H ‐aggregates in the nanoscale hollow spheres is further confirmed by electronic absorption spectroscopic result. This work, representing the first example of controllable organic nanostructures with a hollow sphere morphology fabricated from phthalocyanine provides an effective method towards phthalocyanine hollow nanospheres.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)