DFT Study of α-Keggin-type Iso-polyoxotungstate Anions [HnW12O40](8-n)- (n =1-4): Can [H4W12O40]4- Exist?
DFT Study of α-Keggin-type Iso-polyoxotungstate Anions [HnW12O40](8-n)- (n =1-4): Can [H4W12O40]4- Exist?
复制标题
α-Keggin型异多钨酸盐阴离子[HnW12O40](8-n)- (n =1-4)的DFT研究:[H4W12O40]4-存在吗?
DOI:
10.1021/acs.inorgchem.1c01962
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发表时间:
2021
影响因子:
4.6
通讯作者:
Nakajima Takahito
中科院分区:
文献类型:
--
作者:
Eda Kazuo;Akune Masahiko;Yasuma Chie;Hotta Hiroki;Osakai Toshiyuki;Nakajima Takahito
The Keggin-type iso-polyoxotungstate (iso-POT) anions [HnW12O40](8–n)–’s, in which their central vacancies are occupied by protons, are attractive materials. It is of importance to reveal if the vacancies can be fully occupied by four protons. For further understanding the speciation of these iso-POT anions, relative stabilities and proton transfer reactions between H1[Hn–1W12O40](8–n)–and [HnW12O40](8–n)–were examined in detail by using the first-principles calculations (the nudged elastic band method, the synchronous transit-guided quasi-Newton method, the intrinsic reaction coordinate method, and frequency analysis calculations). Thermochemistry analysis of the proton transfer was also performed. [HnW12O40](8–n)–was energetically more stable than H1[Hn–1W12O40](8–n)–. This held forn= 4. According to the results of thermochemistry analysis, the rate constant and the Wigner correction were respectively 3.1 × 101s–1and 2.2 atT= 298.15 K for the proton transfer from H1[H3W12O40]4–to [H4W12O40]4–, indicating that [H4W12O40]4–can exist when H1[H3W12O40]4–is formed by protonating [H3W12O40]5–.
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DOI:
10.1515/znb-1979-0311
发表时间:
1979
期刊:
Zeitschrift für Naturforschung B
影响因子:
--
作者:
J. Fuchs;E.‐P. Flindt
通讯作者:
E.‐P. Flindt
影响因子:
2.8
作者:
I. Kozhevnikov;A. Sinnema;H. Bekkum
通讯作者:
H. Bekkum
影响因子:
4.6
作者:
Calvin R. Sprangers;J. Marmon;D. C. Duncan
通讯作者:
Calvin R. Sprangers;J. Marmon;D. C. Duncan
影响因子:
2.6
作者:
S. Himeno;Kiyomi Nakajima;K. Eda
通讯作者:
K. Eda
影响因子:
2.8
作者:
I. Kozhevnikov;A. Sinnema;R. Jansen;H. Bekkum
通讯作者:
H. Bekkum