Crystallographic Data. 105. Potassium Copper Dicyanide, KCu (CN)2

Staritzky, Eugene.; Walker, D.

doi:10.1021/ac60111a042

Cited by 10 publications

(16 citation statements)

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“…Single crystals of K[Ag(CN) 2 ], from which the mixed crystals reported herein were prepared, also yielded a single unstructured band in the ν C - N region . These data are consistent with the crystal structure of K[Ag(CN) 2 ] which indicates the presence of only one unique Ag site . In contrast, both FTIR and Raman spectra of a single crystal of Tl[Ag(CN) 2 ] show multiplets in the ν C - N region.…”

Section: Resultssupporting

confidence: 85%

Luminescent Homoatomic Exciplexes in Dicyanoargentate(I) Ions Doped in Alkali Halide Crystals. 2. “Exciplex Tuning” by Varying the Dopant Concentration

et al. 1999

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The dependence of the dicyanoargentate(I) luminescence on the dopant concentration in [Ag(CN)2 -]/KCl single crystals is reported. Three crystals with different Ag content have been studied. The photoluminescence spectrum of the doped crystal that has the lowest silver content (0.17%) is dominated by a high-energy band at ∼295 nm, while the spectrum with the highest silver content (4.3%) is dominated by a low-energy luminescence band at ∼400 nm. The crystal with an intermediate Ag content (2.7%) shows strong emissions from both the high-energy and low-energy bands. Time-resolved luminescence measurements indicate that the excitation energy is transferred between different [Ag(CN)2 -] n oligomers and, thus, leads to the tunable emission observed in the [Ag(CN)2 -]/KCl system. The mechanisms of the radiative and nonradiative processes have been described by a kinetic model that describes the experimental lifetime and time-resolved data.

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Section: Resultssupporting

confidence: 85%

Luminescent Homoatomic Exciplexes in Dicyanoargentate(I) Ions Doped in Alkali Halide Crystals. 2. “Exciplex Tuning” by Varying the Dopant Concentration

et al. 1999

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“…The structural diversity exhibited by other univalent group 11 complexes 1-3 is also evident in the cyanides, an example of this being the K[M(CN) 2 ] (M = Cu, Ag, Au) complexes. The structures for the silver(I) , and gold(I) , species both contain linear [M(CN) 2 ] - ions, but the copper(I) complex contains a helical anion chain in which each copper is three-coordinate.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structures of AuCN and AgCN and Vibrational Spectroscopic Studies of AuCN, AgCN, and CuCN

1998

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The crystal structures of AuCN and AgCN have been determined by powder neutron diffraction measurements. The structure of AuCN consists of rows of linear AuCN chains parallel to [001] with alternating long Au-C = 2.06(2) and short Au-N = 1.82(2) Å. The Au atoms form sheets and are bonded to 6 other Au atoms at a distance of 3.396(2) Å, so that the local environment of each Au atom can be described as a compressed scalehedron. The Au- - -Au distance is within the range expected for an "aurophilic attraction" between these atoms. The AgCN structure is very similar to that for AuCN, in that it consists of rows of AgCN chains with alternating long Ag-C = 2.15(6) and short Ag-N = 1.86(8) Å. The major difference is that the Ag- - -Ag separation within the Ag sheets is noticeably longer, 3.881(5) Å, so that there are no significant Ag- - -Ag interactions. The IR spectra of MCN show nu(CN) at 2170, 2164, 2236; nu(MC,MN) at 591, 480, 598; delta(MCN) at 326, 272, 358; and delta(NMC) = 168, 112, 224 cm(-)(1) for M = Cu, Ag, and Au, respectively. This pattern of band positions strongly suggests that CuCN has the same infinite linear chain structure as AgCN and AuCN. Anomalies in the previously reported IR spectrum of CuCN are shown to be due to the formation of an unusual CuCN/KBr/H(2)O product in KBr disks, which is possibly an intercalation compound involving incorporation of KBr and H(2)O between the chains in the CuCN structure.

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“…[1][2][3] In general it is assumed that either some critical surface structure is altered or destroyed or else the molecule is partially or completely unfolded. 4 For instance, Platzman and Franck6 have postulated that the production of an ion pair in the molecule causes the instantaneous breakage and reorientation of a large number of hydrogen bonds which leads to inactivation. Doty and Geiduschek6 cite two theories which propose that the primary photochemical effect is the rupture of a peptide bond (2) H. Neurath, J. Greenstein, F. Putnam and J. Erickson, Chem.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, the appearance of the full sulfhydryl titer (tertiary change), either from chemical or thermal treatment is invariably associated with irreversible denaturation. 4•11 Yet treatment with agents that specifically alter secondary structure, such as urea or guanidine, produces reversible denaturation which becomes irreversible upon prolonged standing or further exposure to higher temperatures. 10 One of us12 has advanced an hypothesis, summarized below, to explain some of the heat denaturation data of Stearn and others.…”

Section: Introductionmentioning

confidence: 99%

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Trypsin Monolayers at the Air–Water Interface. III. Structural Postulates on Inactivation

Augenstine¹,

Ray²

1957

J. Phys. Chem.

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Crystallographic Data. 105. Potassium Copper Dicyanide, KCu (CN)2

Cited by 10 publications

References 1 publication

Luminescent Homoatomic Exciplexes in Dicyanoargentate(I) Ions Doped in Alkali Halide Crystals. 2. “Exciplex Tuning” by Varying the Dopant Concentration

Luminescent Homoatomic Exciplexes in Dicyanoargentate(I) Ions Doped in Alkali Halide Crystals. 2. “Exciplex Tuning” by Varying the Dopant Concentration

Crystal Structures of AuCN and AgCN and Vibrational Spectroscopic Studies of AuCN, AgCN, and CuCN

Trypsin Monolayers at the Air–Water Interface. III. Structural Postulates on Inactivation

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