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Page 1
Why Nature Chose Potassium.
Danchin A, Nikel PI. Danchin A, et al. J Mol Evol. 2019 Dec;87(9-10):271-288. doi: 10.1007/s00239-019-09915-2. Epub 2019 Oct 28. J Mol Evol. 2019. PMID: 31659374 Review.
The presence of most of the atoms involved in the building up of living cells can be explained by their intrinsic physico-chemical properties. Yet, the involvement of the alkali metal potassium cation (K(+)) is somewhat of a mystery for most scenarios of origins of …
The presence of most of the atoms involved in the building up of living cells can be explained by their intrinsic physico-chemical propertie …
Preparation of Preyssler-type Phosphotungstate with One Central Potassium Cation and Potassium Cation Migration into the Preyssler Molecule to form Di-Potassium-Encapsulated Derivative.
Hayashi A, Wihadi MNK, Ota H, López X, Ichihashi K, Nishihara S, Inoue K, Tsunoji N, Sano T, Sadakane M. Hayashi A, et al. ACS Omega. 2018 Feb 27;3(2):2363-2373. doi: 10.1021/acsomega.8b00163. eCollection 2018 Feb 28. ACS Omega. 2018. PMID: 31458534 Free PMC article.
Density functional theory calculations have confirmed that the potassium cation prefers the central position of the cavity over a side position, in which no water molecules are coordinated to the encapsulated potassium cation. (31)P NMR and cyclic volt …
Density functional theory calculations have confirmed that the potassium cation prefers the central position of the cavity ove …
(18-Crown-6-kappaO)(pyrazolato-kappaN,N')-potassium(I).
Kunz K, Lerner HW, Bolte M. Kunz K, et al. Acta Crystallogr Sect E Struct Rep Online. 2009 Jan 10;65(Pt 2):m171. doi: 10.1107/S1600536808043237. Acta Crystallogr Sect E Struct Rep Online. 2009. PMID: 21581778 Free PMC article.
The asymmetric unit of the title compound, [K(C(3)H(3)N(2))(C(12)H(24)O(6))], is composed of a potassium cation bonded to the six O atoms of a crown ether mol-ecule and the two N atoms of a pyrazolate anion. The KO distances range from 2.8416 (8) to 3.0025 (8) A, an …
The asymmetric unit of the title compound, [K(C(3)H(3)N(2))(C(12)H(24)O(6))], is composed of a potassium cation bonded to the …
The topology of plastid inner envelope potassium cation efflux antiporter KEA1 provides new insights into its regulatory features.
Bölter B, Mitterreiter MJ, Schwenkert S, Finkemeier I, Kunz HH. Bölter B, et al. Photosynth Res. 2020 Jul;145(1):43-54. doi: 10.1007/s11120-019-00700-2. Epub 2019 Dec 21. Photosynth Res. 2020. PMID: 31865509
The plastid potassium cation efflux antiporters (KEAs) are important for chloroplast function, development, and photosynthesis. ...
The plastid potassium cation efflux antiporters (KEAs) are important for chloroplast function, development, and photosynthesis …
Poly[diaqua-[3,5-bis-(trifluoro-meth-yl)pyrazolido]potassium].
Phan HN, Lerner HW, Bolte M. Phan HN, et al. Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 14;66(Pt 8):m928. doi: 10.1107/S1600536810027133. Acta Crystallogr Sect E Struct Rep Online. 2010. PMID: 21588161 Free PMC article.
The asymmetric unit of the title compound, [K(C(5)HF(6)N(2))(H(2)O)(2)](n), is composed of two 3,5-bis-(trifluoro-meth-yl)pyrazol-ide anions, two potassium cations and four water mol-ecules. The water mol-ecules and 3,5-bis-(trifluoro-meth-yl)pyrazolide anions act as bridg …
The asymmetric unit of the title compound, [K(C(5)HF(6)N(2))(H(2)O)(2)](n), is composed of two 3,5-bis-(trifluoro-meth-yl)pyrazol-ide anions …
Poly[(mu-5,7-dihydr-oxy-4-oxo-2-phenyl-4H-chromene-8-sulfonato)potassium(I)].
Liu B, Yang BL. Liu B, et al. Acta Crystallogr Sect E Struct Rep Online. 2008 Dec 13;65(Pt 1):m66-7. doi: 10.1107/S1600536808041779. Acta Crystallogr Sect E Struct Rep Online. 2008. PMID: 21581534 Free PMC article.
In the polymeric title compound, [K(C(15)H(9)O(7)S)](n), the potassium cation is five-coordinated by four sulfonate O atoms and one carbonyl O atom. ...
In the polymeric title compound, [K(C(15)H(9)O(7)S)](n), the potassium cation is five-coordinated by four sulfonate O atoms an …
Poly[diaqua-tetra-μ-seleno-cyanato-cadmium(II)dipotassium(I)].
Reinert T, Boeckmann J, Jess I, Näther C. Reinert T, et al. Acta Crystallogr Sect E Struct Rep Online. 2010 Sep 8;66(Pt 10):i70-i71. doi: 10.1107/S1600536810034938. Acta Crystallogr Sect E Struct Rep Online. 2010. PMID: 21587346 Free PMC article.
These bridging seleno-cyanate anions are further coordinated to two symmetry-related potassium ions. Each of the potassium ions is coordinated by one terminally bonded water mol-ecule and six seleno-cyanate anions, two of which are crystallographically independent. …
These bridging seleno-cyanate anions are further coordinated to two symmetry-related potassium ions. Each of the potassium ion …
The Trifluoromethyl Anion.
Lishchynskyi A, Miloserdov FM, Martin E, Benet-Buchholz J, Escudero-Adán EC, Konovalov AI, Grushin VV. Lishchynskyi A, et al. Angew Chem Int Ed Engl. 2015 Dec 7;54(50):15289-93. doi: 10.1002/anie.201507356. Epub 2015 Oct 26. Angew Chem Int Ed Engl. 2015. PMID: 26499207
First evidence for the existence of free trifluoromethyl anion CF3 (-) has been obtained. The 3D-caged potassium cation in [K(crypt-222)](+) is inaccessible to CF3 (-) , thus rendering it uncoordinated ("naked"). ...
First evidence for the existence of free trifluoromethyl anion CF3 (-) has been obtained. The 3D-caged potassium cation in [K( …
Synthesis of New Flexible Coumarin Dimers for Sodium and Potassium Differentiation.
Tan D, Akdag A. Tan D, et al. J Fluoresc. 2020 Jan;30(1):27-34. doi: 10.1007/s10895-020-02492-4. Epub 2020 Jan 21. J Fluoresc. 2020. PMID: 31965403
In fluorescence titration experiments, diethylene glycol linked coumarin-3-carboxylate dimer is responsive for sodium ions but not for potassium ions. The driving force for the complexation of metal cation and fluorescence probes is thought to be size-matching. ...T …
In fluorescence titration experiments, diethylene glycol linked coumarin-3-carboxylate dimer is responsive for sodium ions but not for po
Enantioselective Alkynylation of Trifluoromethyl Ketones Catalyzed by Cation-Binding Salen Nickel Complexes.
Park D, Jette CI, Kim J, Jung WO, Lee Y, Park J, Kang S, Han MS, Stoltz BM, Hong S. Park D, et al. Angew Chem Int Ed Engl. 2020 Jan 7;59(2):775-779. doi: 10.1002/anie.201913057. Epub 2019 Dec 2. Angew Chem Int Ed Engl. 2020. PMID: 31713948
Cation-binding salen nickel catalysts were developed for the enantioselective alkynylation of trifluoromethyl ketones in high yield (up to 99 %) and high enantioselectivity (up to 97 % ee). ...UV-vis analysis revealed the pendant oligo-ether group of the catalyst strongly
Cation-binding salen nickel catalysts were developed for the enantioselective alkynylation of trifluoromethyl ketones in high yield (
163 results