Porphyrin and Phthalocyanine Chemistry
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Abstract
Abstract
Metal phthalocyanines (MPcs) possess outstanding thermal stability and versatile optical, catalytic, and semiconducting properties. Here, the effects of central metal ions, peripheral substituents, and substitution positions on the vibrational properties of MPcs were systematically investigated using Raman spectroscopy. The characteristic Raman band near 1530 cm−1 exhibits systematic shifts with changing metal centers (NiPc > CoPc > CuPc > ZnPc), reflecting differences in metal-ligand interactions and electronic structure. Peripheral substituents and their positions further influence the Raman response through electronic effects, vibrational coupling, and resonance enhancement. In particular, four-substituted MPcs show greater Raman shifts than their three-substituted counterparts. The results reveal clear correlations between molecular structure and Raman characteristics, providing a useful framework for understanding and designing functional phthalocyanine-based materials.
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@article{Zhang2026Raman,
title = {Raman Study of Central Metals and Substituents Effects on Metal Phthalocyanines},
author = {Xiaofang Zhang and Dongliang Tian and Rongming Wang},
journal = {Nanomaterials},
year = {2026},
doi = {10.3390/nano16160982},
url = {https://doi.org/10.3390/nano16160982}
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