New Ferroelectrics Based on Divalent Metal Ion Alum

作者：Zhang Wen; Chen Li Zhuang; Xiong Ren Gen^*; Nakamura Takayoshi; Huang Songping D

来源：Journal of the American Chemical Society, 2009, 131(35): 12544-+.

DOI：10.1021/ja905399x

A detailed study of two alum-type complexes containing the SeO(4)(2-) anion, 1,4-diazoniabicyclo[2.2.2]octane hexaaquacopper(II) bis(selenate) [(H(2)dbco)Cu(H(2)O)(6)(SeO(4))(2), 1] and its deuterated analogue (D(2)dbco)Cu(D(2)O)(6)(SeO(4))(2) (2), has revealed that 1 and 2 are new ferroelectrics that undergo a paraelectric-ferroelectric phase transition at ca. -140 to -138 degrees C as a result of order-disorder features of the cation ([H(2)dbco](2 ) or [D(2)dbco](2 )) and anion (selenate). These are the first examples of ferroelectrics based on divalent metal anion alum analogues since the discovery of ferroelectrics based on trivalent metal anion alum in similar to 1960.

• 出版日期2009-9-9
• 单位东南大学