Polyatomic molecules in condensed phase: bond order index and solvation energy studied by RISM-SCF theory

The reference interaction site model – self-consistent field (RISM-SCF) theory was applied to a series of
 polyatomic molecules in aqueous solution, including CH₄, NH₃, H₂O and HF. The bond order index, which
 characterizes the chemical bond, and its change by the solvation were stud...

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Bibliographic Details
Published in:Condensed Matter Physics
Date:2007
Main Authors: Sato, H., Yokogawa, D., Sakaki, S.
Format: Article
Language:English
Published: Інститут фізики конденсованих систем НАН України 2007
Online Access:https://nasplib.isofts.kiev.ua/handle/123456789/118701
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Journal Title:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Cite this:Polyatomic molecules in condensed phase: bond order index and solvation energy studied by RISM-SCF theory / H. Sato, D. Yokogawa, S. Sakaki // Condensed Matter Physics. — 2007. — Т. 10, № 3(51). — С. 373-380. — Бібліогр.: 14 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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Summary:The reference interaction site model – self-consistent field (RISM-SCF) theory was applied to a series of
 polyatomic molecules in aqueous solution, including CH₄, NH₃, H₂O and HF. The bond order index, which
 characterizes the chemical bond, and its change by the solvation were studied by comparison with a dielectric
 continuum model. The change in the electronic structure was also associated with the solvation free energy.
 We find that the bond order indexes are not sensitive to the solvation effect even if the charge assigned to
 the atom is considerably changed. The distortion in the electronic energy is in proportion to the change in
 the solvation energy, showing that the linear response regime is a good expression of the solvation process
 examined here, in spite of solving the non-linear RISM-SCF equation. Теорiя базисної моделi взаємодiючих силових центрiв-самоузгоджене поле (RISM-SCF) застосована до серiї багатоатомних молекул у водному розчинi, включаючи CH₄, NH₃, H₂O i HF. Iндекс послiдовностi зв’язку, що характеризує хiмiчний зв’язок, та його змiна внаслiдок сольватацiї порiвнюються з результатами, отриманими в рамках моделi дiелектричного контiнiуму. Змiни в електроннiй структурi також обумовленi вiльною енергiєю сольватацiї. Показано, що iндекси послiдовностi зв’язку не є чутливими до сольватацiйного ефекту, навiть якщо приписуваний атому заряд суттєво змiнюється. Змiна електронної енергiї є пропорцiйна змiнi сольватацiйної енергiї та показує, що режим лiнiйного вiдгуку є добрим вираженням дослiджуваних сольватацiйних процесiв, незважаючи на нелiнiйний характер RISM-SCF рiвняння.
ISSN:1607-324X