• Bulletin of the Korean Chemical Society
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• 제25권12호
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• pp.1869-1873
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• 2004

trans-Dihydroxo[5,10,15,20-tetrakis(n-pyridyl)porphyrinato]tin(IV) (n = 3 and 4) complexes have been synthesized and fully characterized. X-ray structural analysis of trans-dihydroxo[5,10,15,20-tetrakis(4-pyridyl)porphyrinato]tin(IV) reveals that the supramolecular hydrogen bondings between the hydroxotin(IV) porphyrins and lattice water molecules form a hydrogen-bonded two-dimensional network. The hydrogen bonding mode between the tin(IV) porphyrins and the water molecules closely resembles that of the hydrogenbonded outer-sphere intermediate in the acidolysis of dihydroxotin(IV) porphyrins.

• Bulletin of the Korean Chemical Society
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• 제24권6호
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• pp.777-779
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• 2003

Density functional calculations and ab initio calculations have been carried out to study the lowest energy structure of the water ($H_2O)_{11}$. Among five structures suggested by four different groups, the lowest energy structure is found to have the skeletal structure of Prism56 (Pr56-24) that a cyclic pentamer and a cyclic hexamer are fused into a prism-shape with 16 hydrogen-bonds (HBs).

• Bulletin of the Korean Chemical Society
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• 제32권9호
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• pp.3215-3218
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• 2011

A new anion receptor utilizing carbamate functionality as hydrogen bonding site has been designed and synthesized. This new receptor 2 has two amide hydrogens and two carbamate hydrogens anchored at 1,8-position of anthracene. These four hydrogens form a concave structure for the anions and the receptor 2 was found to be a selective receptor for acetate among the anions investigated.

• 약학회지
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• 제18권3호
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• pp.209-216
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• 1974

From the measurements of infrared and fluorescence spectra riboflavin-2',3',4',5'-tetraacetate has been found to associate with penicillin-V more than strongly with themselves. They form the 1 : 1 cyclic hydrogen bonded dimer through the imino and the 2-C carbonyl groups of the isoalloxazine ring and the imino group of the penicillin-V ressidue. Pernicillin-V is an effective quencher of the fluorescence of riboflavin through hydrogen bonds partly due to the collision interaction with the penicillin ring.

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

• 대한화학회지
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• 제57권6호
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• pp.721-725
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• 2013

Reaction between 2-pyridinecarboxylic acid (Hpic) and $K_3[Cr(O_2)_4]$ give complex $[Cr(pic)_3].H_2O$ (1) which is characterized by elemental analysis and spectroscopic methods (FT-IR, Raman) and X-ray crystallography. In the crystal structure of 1, chromium atom with coordinated by three nitrogen and three oxygen atoms has a distorted octahedral geometry. Also a water molecule is incorporated in crystal network. Each water molecule acts as hydrogen bond bridging and connects two adjacent complexes by two $O-H{\cdots}O$ hydrogen bonds.

• 대한화학회지
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• 제21권5호
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• pp.320-329
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• 1977

p-Phenylenediamine dihydroperchlorate의 세포상수는 $a=4.79{\pm}0.02,\;b=9.03{\pm}0.02,\;c=7.12{\pm}0.03{\AA},\;{\alpha}=109.4{\pm}0.2,\;{\beta}=79.6{\pm}0.2,\;r=104.6{\pm}0.2^{\circ},\;Z=1$이며 공간군은 $P\={1}$이다. 구조는 Patterson 및 Fourier법으로 해석하였으며 block diagonal 최소자승법으로 정밀화하였따. 등경사 Weissenberg 사진들에서 얻은 387개의 관측된 반사에 대하여 R값은 0.13이었다. 이 물질의 결정구조에서 수소결합은 아미노기와 과염소산 이온 사이에서 이루어져 있으며 2가지 형이 있다. 첫째것은, 한개의 삼지형 N${\cdot}{\cdot}{\cdot}$O 수소결합이고, 둘째것은, 보통형의 2개의 N${\cdot}{\cdot}{\cdot}$O 수소 결합이다. 한개의 p-phenylenediamine 그룹은 실험오차 내에서 평면이며 12개의 과염소산이온에 결합되어 있다. 그중 10개의 과염소산이온은 수소결합으로 연결되어 있으며 2개는 van der Waals 힘들로 접촉되어 있다. 한개의 과염소산이온은 6개의 p-phenylenediamine과 4개의 과염소산이온에 의하여 둘러싸여 있따. 6개의 p-phenylenediamine 그룹 중 5개는 수소결합이 되어있고 나머지는 van der Waals 힘으로 접촉되어 있다.

• 한국수소및신에너지학회논문집
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• 제16권1호
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• pp.9-16
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• 2005

We studied the electrochromic properties of hydrated amorphous ruthenium oxide ($RuO_2{\cdot}xH_2O$) thin films using in-situ Raman spectroscopy during electrochemical charging/discharging cycles. We have found that the principal effect of hydrogen insertion into $RuO_2{\cdot}xH_2O$ is reduction of $Ru^{4+}\;to\;Ru^{3+}$, and not formation of new bonds involving hydrogen. We compared the changes in the Raman spectrum of a gasochromic $Pd/RuO_2{\cdot}xH_2O$ film as it is exposed to hydrogen gas with that of electrochemical hydrogen insertion. We tested the changes in the optical transmission of the $Pd/RuO_2{\cdot}xH_2O$ film when exposed to hydrogen gas.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 C
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• pp.1532-1535
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• 1996

Diamond-like carbon (DLC) films have been prepared by a widely-used plasma CVD with an rf (13.56MHz) plasma of $CH_4$ gas. The hydrogen incorporated in DLC films plays an important role of determining the film properties, but its exact role has not been clear. In this study, the effect of hydrogen on the film properties of DLC has been examined by adding the hydrogen gas to the $CH_4$ gas during deposition and by exposing the prepared film to the hydrogen plasma. As the content of additive hydrogen gas increases, the density and hardness of the film increase, but the growth rate decreases. The FT-IR spectroscopy results show that the number of C-H bonds decreases with increasing the hydrogen gas. Also, the variation in the position of "G" and "D" peaks due to additive hydrogen, which has been measured by the Raman spectroscopy, indicates of $sp^3$ fraction.

• 대한화학회지
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• 제29권2호
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• pp.151-157
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• 1985

클로로포름 용액에서 1,10-diaza-4,7,13,16-tetraoxacyclooctadecane(cryptand 22), 1,7-diaza-4,10,13-trioxacyclopentadecane(cryptand 21), 1,12,15-triaza-5,8-dioxa-3,4:9,10-dibenzocycloheptadecane ($N_3O_2$) 및 1,12-diaza-5,8-dioxa-3,4:9,10-dibenzocyclotetradecane ($N_2O_2$)의 분자간 수소결합을 $^1H$-nmr 분광법으로 여러 온도에서 조사하였다. 묽은 용액에서 이 화합물들은 -NH기를 통한 수소결합에 의하여 이합체를 형성한다. 수소결합형성에 대한 평형상수 값의 크기는 cryptand 22 > cryptand 21 > $N_3O_2$ > $N_2O_2$의 순위이었다. 이 평형에는 분자구조의 대칭성과 분자내의 -NH기의 수와 위치가 영향을 미치고 있었다.