• 제목/요약/키워드: Zinc coordination

검색결과 46건 처리시간 0.025초

Noncovalently Linked Zinc Porphyrin-Ru(bpy)3 Dyad Assembled via Axial Coordination

  • Kim, Dol;Shin, Eun-Ju
    • Bulletin of the Korean Chemical Society
    • /
    • 제24권10호
    • /
    • pp.1490-1494
    • /
    • 2003

  • Noncovalently linked electron donor-acceptor dyad consisting of zinc tetratolylporphyrin and pyridine appended ruthenium trisbipyridine comlex was prepared, via axial coordination of pyridine moiety in ruthenium trisbipyridine complex on zinc tetratolylporphyrin. For the purpose of comparison, axial coordination of pyridine-appended 2,2'-bipyridine on zinc tetratolylporphyrin was also investigated. The Kvalues were detemined based on absorption of fluorescence studies. The fluorescence of zinc teratolylporphrin was efficiently quenched upon axial coordination of pyridine moiety, prbably due to the photoinduced electron transfer from zinc tetrtolylporphyrin to ruthenium trisbipyridine, supported by free enegy estimation.

  • https://doi.org/10.5012/bkcs.2003.24.10.1490 인용 PDF KSCI

Systematic Chirality Investigations of Zn-TLM binding Sites by 2D-NOESY Back-calculations

  • Kim, Daesung;Hoshik Won
    • 한국자기공명학회논문지
    • /
    • 제2권1호
    • /
    • pp.50-58
    • /
    • 1998

  • The systematic chirality investigations were made on the basic of the fact that zinc-binding tallysomycin (ZnTLMA) could have chiral centers (Zn, NC3, C6) at possible 4-, 5-, and 6-coordination models. Although our NMR data exhibit that the ligation sites are ${\beta}$-aminoalanine, ${\beta}$-hydroxyhistidine, and pyrimidine moiety, all possible coordination modes were tested out to see what kind of chiralities on NC3-C6 are favorable to each coordination mode. Tests were also made that take into account the specific configuration of functional groups, including ${\beta}$-aminoalanine, sugar ring, and ${\beta}$-hydroxyhistidine. Tests were finally extended to zinc-water binding and specific conformational studies by introducing various hydrogen bonding networks associated with the propionamide side chain and the carbamide group of mannose. Results of systematic chirality investigations exhibit that the S-S configuration of NC3-C6 is favorable to all of coordination models, but the R-S configuration, if exists at all, should have internal strain on C6 chiral center.

  • PDF

Hydrothermal Synthesis, Crystal Structures and Properties of Zinc(II) Di-nuclear Complex and Copper(I) Coordination Polymer Based on Building Block 2-Phenyl-4,6-di(pyridin-2-yl)pyrimidine

  • Zhao, Pusu;Jing, Wang;Jing, Long;Jian, Fangfang;Li, Yufeng
    • Bulletin of the Korean Chemical Society
    • /
    • 제34권12호
    • /
    • pp.3743-3748
    • /
    • 2013

  • A tetradentate ligand of 2-phenyl-4,6-di(pyridin-2-yl)pyrimidine (L) has been synthesized and its complexes with $ZnI_2$ and CuI have been obtained by hydrothermal method. single crystal X-ray diffraction analysis indicates that ligand L coordinates with Zn(II) ions to form a simple four-coordinate di-nuclear complex, while the complexation of L with Cu(I) constructs a one-dimensional chain polymer. The existence of $I^-$ ion hampers the L to assemble grid-type complexes with Zn(II) and Cu(I). Fluorescence spectra show that the L emits blue fluorescence while its Cu(I) polymer decrease the fluorescence intensity and Zn(II) complex quenches the fluorescence.

  • https://doi.org/10.5012/bkcs.2013.34.12.3743 인용 PDF KSCI KPUBS HTML

3차원 Zinc-Phosphate 배위 고분자: $Zn_3(PO_4)_2(H_2O)$의 수열합성 및 구조 (A Three-Dimensional Zinc-Phosphate Coordination Polymer: Hydrothermal Synthesis and Structure of $Zn_3(PO_4)_2(H_2O)$)

  • Dongwon Min;Ji-Young Back;Hyun Sue Hoe;Soon Won Lee
    • 한국결정학회지
    • /
    • 제12권3호
    • /
    • pp.145-149
    • /
    • 2001

  • Pyrazine 존재 하에서, Zn(NO₃)₂·존재 하에서 . Zn(NO,)7·6H₂O와 K₂HPO₄가 수열반응하여 Zn₃(PO₄)₂(H₂O) (1)실험식을 갖는 3차원 zinc-phosphate 배위 고분자가 합성되었다. 화합물 1의 구조가 IR 분광법 및 X-ray 회절법으로 규명되었다. 화합물 1의 결정학적 자자료: 단사정계 공간군 P2₁/c, a=8.750(1)Å, b=4.901(1)Å, c=16.759(3)Å, β=94.98(2)°, Z=4, R(wR₂)=0.0332(0.0927).

  • PDF