• 한국결정학회지
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• 제4권1호
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• pp.25-35
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• 1993

Tetra-tert-butyl-tetrapropionyloxycalix (4) arena (C,6H,20s)의 분자 및 결정구조를 X-선 회절법으로 연구하였다. 이 결정은 삼사정계이고 공간군은 P1이다. 단위세포 길이는 a=13.664(5), b=17.585(5), c= 12.863(2)A이며 a=109.33(2), B=111.97(2), r=76.45(3) ˚, Z=2이다. 회절반점들의 세기는 흑연단색화 장치가 있는 Enraf-Nonius CAD-4 Diffractometer로 얻었으며, Mo-Ka X-선(A=0.7107A )을 사용하였다. 분자구조는 직접법으로 풀었으며 최소자 승법으로 정밀화하였다. 최종 신뢰도 R값은 2561개의 회절반점에 대하여 0.084이었다. 본 Calixarene은 partial cone conformation을 가져서 세개의 tort-butylphenyl group들과 하나의 tort-butylphenyl group의 상대적인 배열이 다르다. 세개의 propionyloxy group들은 macrocycle로 된 cavity바깥 쪽을 향하여 배열되어 있다.

• 대한화학회지
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• 제62권6호
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• pp.427-432
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• 2018

The reaction of [$[Ni(L)]Cl_2{\cdot}2H_2O$ (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo[$14,4,0^{1.18},0^{7.12}$]docosane) with 1,1-cyclohexanediacetic acid ($H_2cda$) yields mononuclear nickel(II) complex, [$Ni(L)(Hcda^-)_2$] (1). This complex has been characterized by X-ray crystallography, electronic absorption, cyclic voltammetry and thermogravimetric analyzer. The crystal structure of 1 exhibits a distorted octahedral geometry with four nitrogen atoms of the macrocycle and two 1,1-cyclohexanediacetate ligands. It crystallizes in the triclinic system P-1 with a = 11.3918(7), b = 12.6196(8), $c=12.8700(8){\AA}$, $V=1579.9(2){\AA}^3$, Z = 2. Electronic spectrum of 1 also reveals a high-spin octahedral environment. Cyclic voltammetry of 1 undergoes one wave of a one-electron transfer corresponding to $Ni^{II}/Ni^{III}$ process. TGA curve for 1 shows three-step weight loss. The electronic spectra, electrochemical and TGA behavior of the complex are significantly affected by the nature of the axial $Hcda^-$ ligand.

• Bulletin of the Korean Chemical Society
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• 제25권1호
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• pp.85-89
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• 2004

Geometrical structures of [Pd(L)$Cl_2$] with oxathia macrocycles have been calculated using ab initio secondorder Moller-Plesset (MP2) and Density Functional Theory (DFT) methods with triple zeta plus polarization (TZP) basis set level. In optimized Pd(L)$Cl_2$ complexes, Pd(II) locates at the center surrounded by a square planar array of two sulfurs on an oxathia macrocycle and two chlorides. The endo-Pd(II) complexes with an axial (Pd${\cdots}$O) interaction are more stable than the exo-Pd(II) complexes without the interaction. In the endo-Pd(II) complexes, the atomic charge of the oxygen atom moves to Pd(II) via the axial ($Pd{\cdots}$O) interaction and then, the charge transfer from Pd(II) to the S-atoms occurs stepwise via ${\pi}$-acceptors of the empty d-orbitals.

• Bulletin of the Korean Chemical Society
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• 제32권5호
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• pp.1761-1764
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• 2011

• Rapid Communication in Photoscience
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• 제2권2호
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• pp.39-41
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• 2013

It is interesting to introduce viologen moiety into photoactive compounds such as porphyrin and anthracene in the study of supramolecular system such as pseudorotaxanes. For the construction of photoactive pseudorotaxane based on porphyrin-viologen-anthracene triad or its zinc derivative threaded with bis-p-phenylene-34-crown-10 macrocycle, porphyrin-viologen-anthracene triad 1 and its zinc derivative zinc porphyrin-viologen-anthracene triad 2 were prepared and their absorption and fluorescence spectral properties were measured.

• Bulletin of the Korean Chemical Society
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• 제28권3호
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• pp.489-492
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• 2007

• Bulletin of the Korean Chemical Society
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• 제32권1호
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• pp.325-328
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• 2011

• Bulletin of the Korean Chemical Society
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• 제25권10호
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• pp.1581-1584
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• 2004

• Bulletin of the Korean Chemical Society
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• 제28권2호
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• pp.303-306
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• 2007

• Bulletin of the Korean Chemical Society
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• 제33권12호
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• pp.4251-4254
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• 2012