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Amine‐Intercalated Layered Sn II Phosphates with Open‐Framework Structures
Author(s) -
Ramaswamy Padmini,
Natarajan Srinivasan
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200600273
Subject(s) - chemistry , crystallography , ethylenediamine , amine gas treating , protonation , lone pair , crystal structure , molecule , phosphonate , hydrogen bond , trigonal bipyramidal molecular geometry , hydrothermal circulation , hydrothermal synthesis , stereochemistry , inorganic chemistry , ion , organic chemistry , seismology , geology
Three new Sn II phosphate materials, [NH 3 (CH 2 ) 3 NH 2 (CH 2 ) 2 NH 2 (CH 2 ) 3 NH 3 ] · 2[Sn 2 P 2 O 8 ] ( I ), [(N 2 C 5 H 14 ) 2 ][Sn 4 P 4 O 16 ] · 3H 2 O ( II ) and [(N 2 C 5 H 14 )][Sn 2 P 2 O 8 ] · H 2 O ( III ), have been synthesised by means of hydrothermal methods using N , N′ ‐bis(3‐aminopropyl)ethylenediamine (BAPEN; for I ) and homopiperazine (H‐PIP; for II and III ), respectively, as the structure‐directing organic amines. The solids I – III have layered architectures. The structures of all three compounds consist of strictly alternating vertex‐sharing trigonal‐pyramidal SnO 3 and tetrahedral PO 4 moieties forming infinite layers possessing apertures bound by 4‐ and 8‐T atoms (T = Sn, P). The distorted 4‐ and 8‐membered apertures within the layers suggest the subtle influence of the lone‐pair of electrons of Sn II on the structure. The interlamellar space is occupied by the protonated organic amine molecules which interact with the framework through N–H ··· O hydrogen bonding. The compounds I – III bear some structural relationship to the layered zinc phosphite phases. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)