NIR Absorbing Aromatic E‑Ethylene Bridged Hexaphyrins (2.1.1.2.1.1): Synthesis, Characterization, and Protonation Studies

Sumit, Sahoo and Maheshwari, Horalavadi Mahadavaiah and Usharani, Dandamudi and Harapriya, Rath (2023) NIR Absorbing Aromatic E‑Ethylene Bridged Hexaphyrins (2.1.1.2.1.1): Synthesis, Characterization, and Protonation Studies. Organic Letters, 25. pp. 1491-1496.

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Abstract

Judicious syntheses, spectroscopic analyses, and solid state structural evidence of two structural variants (with planar geometry) of strongly aromatic hybrid [30] E-ethylene bridged hexaphyrins (2.1.1.2.1.1) exhibiting strong NIR absorption are reported. The induced correspondence of fused phenanthrene on the pyrrole moieties has led to a further red-shift of up to ∼45 nm in the neutral and protonated form of the macrocycles. The electronic nature and aromaticity of both hexaphyrins are fully supported by DFT calculations.

Item Type:	Article
Uncontrolled Keywords:	Judicious syntheses, spectroscopic analyses, NIR absorption
Subjects:	500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 24 Organic Chemistry
Divisions:	Food Safety Analytical Quality Control Lab
Depositing User:	Somashekar K S
Date Deposited:	18 Dec 2025 11:16
Last Modified:	18 Dec 2025 11:16
URI:	http://ir.cftri.res.in/id/eprint/20214

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