کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1332384 | 1500115 | 2013 | 6 صفحه PDF | دانلود رایگان |
Three new vanadoborates [H3teta]3[V12B18O54(OH)6(H2O)]·(H3O)·5H2O (1, teta=triethylenetetramine), [H4teta]2[V6B22O44(OH)10] ·4.5H2O (2) and [H4tepa]2[V6B22O44(OH)10] ·4H2O (3, tepa=tetraethylenepentamine) have been hydrothermally synthesized and structurally characterized. 1 contains cage cluster [V12B18O54(OH)6(H2O)]10− based on one puckered B18O36(OH)6 ring sandwiched between two V6O15 clusters. Both 2 and 3 contain new decorated cage cluster [V6B22O44(OH)10]8− built up from a central band of [V6O18] capped top and bottom by two raft-like polyborate [B11O20(OH)4] units. The magnetic susceptibility of 3 demonstrates the presence of antiferromagnetic interaction between VIV cations. The theoretical band structure and spectroscopic properties have been also studied.
The circular [V6O18] fragment sandwiched by the two raft-like polyborate [B11O20(OH)4] units via sharing O atoms form a new cage cluster [V6B22O44(OH)10]8−, which represents a new type.Figure optionsDownload as PowerPoint slideHighlights
► Novel decorated cage cluster [V6B22O44(OH)10] is observed.
► The mixed valence vanadoborate cluster is found.
► The theoretical band structure and spectroscopic properties have been also studied.
Journal: Journal of Solid State Chemistry - Volume 201, May 2013, Pages 79–84