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2005
Vanadium
I 5000
13- 025
Novel Topotactic Conversion of an Organically Templated Vanadyl Phosphate
Framework into Layered Structures. — K+, Rb+, Tl+, and N H+4 cations undergo a
novel topotactic exchange reaction with (H2en)0.5 [VO2PO4{P(OH)2}0.48] at room temperature leading to intercalated layered vanadyl phosphates
M0.45VOPO 4·yH2O (M: K+, Rb+, Tl+, N H+4 ). The new phase Tl 0.45VOPO4·0.33H2O is obtained under ambient conditions. The reaction with Ag+ ions results in the new monoclinic compound Ag3.5VP 1.5O8 coated with Ag metal nanospheres which, on heating
above 400 °C, yields a 2:1 mixture of two thermodynamically stable phases,
Ag2VO 2PO4 and Ag3PO4. — (ASNANI, M.; SHARMA, S.; LOFLAND, S. E.;
RAMANUJACHARY, K. V.; BUFFAT, P. A.; RAMANAN*, A.; Eur. J. Inorg. Chem.
2005, 2, 401-409; Dep. Chem., Indian Inst. Technol. Delhi, New Delhi 110 016, India;
Eng.) — W. Pewestorf
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