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On the Protonated C-60-Piperazine Double Adducts: Their Relative Stabilities and Vibronic Coupling Induced Absorptions in the Visible Range
Journal article

On the Protonated C-60-Piperazine Double Adducts: Their Relative Stabilities and Vibronic Coupling Induced Absorptions in the Visible Range

Hanying Xu and Karl Sohlberg
Journal of computational and theoretical nanoscience, v 6(6), pp 1370-1382
01 Jun 2009

Abstract

Chemistry Chemistry, Multidisciplinary Materials Science Materials Science, Multidisciplinary Nanoscience & Nanotechnology Physical Sciences Physics Physics, Applied Physics, Condensed Matter Science & Technology Science & Technology - Other Topics Technology
A systematic computational investigation of C-60-piperazine bis-adducts and their protonated forms was carried out at the ZINDO(s)//PM3 level of theory. Intra-molecular hydrogen bonding and electrostatic repulsion between ammonium groups are proposed as the deciding factors in the relative stabilities of protonated C-60-piperazine bis-adducts. Boltzmann populations at 298 K of the mono-, di-, tri- and tetra-protonated C-60-piperazine bis-adducts were calculated according to their relative stabilities. Visible spectra of the protonated C-60-piperazine bis-adducts were produced using the ZINDO(s) method. Population-weighted spectra were obtained using the calculated Boltzmann populations. A protocol was developed to visualize colors of protonated C-60-piperazine bis-adducts using their theoretically predicted population-weighted visible spectra. Color changes are predicted to occur during the course of successive protonation of C-60-piperazine bis-adducts based on the computational results.

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Collaboration types
Domestic collaboration
Web of Science research areas
Chemistry, Multidisciplinary
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
Physics, Applied
Physics, Condensed Matter
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