Guo Y, Haase D, Manz J, Wang H, Yang Y. Time-Dependent Extension of Grimme's Continuous Chirality Measure for Electronic Chirality Flips in Femto- and Attosecond Time Domains.
Chemphyschem 2024:e202400132. [PMID:
38844417 DOI:
10.1002/cphc.202400132]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Indexed: 07/30/2024]
Abstract
Grimme's Continuous Chirality Measure (C C M ${CCM}$ ) was developed for comparisons of the chirality of the electronic wave functions of molecules, typically in their ground states. For example,C C M = 14 . 5 ${CCM=14.5}$ ,1 . 2 ${1.2}$ and0 . 0 ${0.0}$ for alanine, hydrogen-peroxide, and for achiral molecules, respectively. Well-designed laser pulses can excite achiral molecules from the electronic ground state to time-dependent chiral superposition states, with chirality flips in the femto- or even attosecond (fs or as) time domains. Here we provide a time-dependent extensionC C M t ${CCM\left(t\right)}$ of Grimme'sC C M ${CCM}$ for trailing the electronic chirality flips. As examples, we consider two laser driven electronic wavefunctions which represent flips between opposite electronic enantiomers of oriented NaK within4 . 76 f s ${4.76\ {\rm f}{\rm s}}$ and433 a s ${433\ {\rm a}{\rm s}}$ . The correspondingC C M t ${CCM\left(t\right)}$ vary respectively from14 . 5 ${14.5}$ or from13 . 3 ${13.3}$ to0 . 0 ${0.0}$ , and back.
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