| บทคัดย่อ |
A discrete trinuclear Cu(II) complex, namely, [Cu3(pzdc)2(dpyam)2(H2O)4] (1) (H3pzdc ¼ pyrazole-3,5-dicarboxylic acid, dpyam ¼ 2,20-dipyridylamine) was simply synthesized by the sonochemical process
and structurally characterized. The single-crystal X-ray diffraction analysis revealed that three adjacent
Cu(II) centers are linked via two bridging pzdc ligands to form a trinuclear Cu(II) unit. Each trinuclear Cu(II)
unit contains open coordination sites with two trigonal bipyramidal Cu(II) centers and one elongated
octahedral geometry. Moreover, the open coordination site of 1 was occupied by a small molecule,
leading to the guest-induced structural transformation with chromism that was verified by FT-IR, UV-vis
diffuse reflectance spectra, elemental analysis, PXRD, and SEM techniques. Compound 1 exhibits color
change along with structural transformation in methanol media and after the dehydration process. Also, 1 shows different color responses after exposure to different amine vapors. In addition, compound 1 was
conveniently deposited onto a filter paper by a sonochemical method used as a portable test strip for
the discriminative qualitative detection of amines. |
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