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Updated: Jul 2, 2025

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
Phosphorus(V) Tetraazaporphyrin with an Intense, Broad CT Band in the Near-IR Region
Takuya Yoshida1, Yusuke Okada2, Tomotaka Namikawa3
1Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
Abstract:
In phosphorus tetraazaporphyrins (PTAPs), the Q- and charge-transfer (CT) bands appear as a result of configuration interaction between their excited states. On the basis of this concept, a PTAP with an intense, broad CT band in the near-IR region has been rationally designed and realized by introducing eight diphenylaminophenyl (dPAP) groups. The order of the CT and Q-bands in ascending energy was supported by magnetic circular dichroism (MCD) spectroscopy and theoretical calculations. An intense two-photon absorption was also found in the deep near-IR region.
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