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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Simple Control of Crystallization dimensionality using a Tetrazolyl ligand: 0?D Ni2+, 1?D Cu2+, 2?D Zn2+, and 3?D Fe3+ complexation arrangements

2011년 8월 5일 01시 21분 54초
Ⅳ-INOR.P-108 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 <발표Ⅳ>
저자 및
이준승, 강이영, 김성애, 김세란, 고민정
전남대학교 화학과, Korea
The ability to control molecular crystalline growth and features continues to be rigorously explored due to the application of many solid state arrays in the electronics industry etc… . Simple ligand starting materials as well as ambient conditions also are important. Herein, we report the syntheses, characterizations and metal complexes containing the tetrazolyl ligand {5?(2?hydroxy)phenyl}tetrazolyl (LH2), which form various high dimensional coordination polymers in the crystalline solid state are provided. From the reaction of metal perchlorate, 2,2’?bipyrimidine (bpym), KOH and ??tetrazolyl (LH2) in H2O and DMF, 0?D [NiL(bpym)2] (1)1?D Zigzag type complex [CuL(bpym)}n (2) , 2?D [ZnL(bpym)]n (3) and 3?D [K3(bpym)FeL3(H2O)7]n (4) coordination complexes were synthesized inexpensively in high isolated yield and structurally characterized by elemental analyses, IR spectra, Single crystal X-ray crystallography. Importantly, the formation of dimensionality in these systems based on metal appears selective. Whereas Ni complexes didn’t show any infinite bonding to be coordination polymer, Cu and Zn complexes have extra bonding with tetrazolyl part of other other repeating units. The environment of metal center of Cu and Zn are quite similar, but Zn have significantly short Zn - O bonding with other hydroxyl group, resulting in the formation of two dimensional connectivity. Fe3+ complex showed totally different contents from complexes 1 ? 3. Three K atoms, one Fe, three L ligand and 7 water molecules formed a repeating unit and a novel dual?tridentate iron anion fragment (FeL33?) was observed. It has strong interaction with two K atoms, resulting in the sandwich-like formation with the sequence of K? FeL3?K. Extremely short Fe?K was also observed.(