Low-temperature heat capacity of Ir(C5H7O2)(C8H12)

Bespyatov, M.A.; Kuzin, Timofei M.; Наумов, В. В.; Vikulova, E. S.; Ilyin, Igor Yu.; Morozova, N. B.; Gelfond, N. V.

doi:10.1016/j.jct.2016.03.044

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…Volatile complexes of iridium, platinum, and gold with pentane-1,3-dionate (acac), 2,2,6,6trimethylheptane-3,5-dionate (thd), and cyclooctadiene-1,3 (cod) ligands, [Ir(cod)(acac)], [Pt(acac) 2 ], and [(CH 3 ) 2 Au(thd)], were synthesized and characterized in detail in [26][27][28][29][30] for the deposition of metal coatings and nanoparticles. The details of synthesis and characterization of these precursors are presented in the Supplementary Materials.…”

Section: Deposition Of Ir Pt and Irpt Metal Coatings And Au And Ag Nanoparticlesmentioning

confidence: 99%

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

et al. 2021

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This work is aimed at developing the modification of the surface of medical implants with film materials based on noble metals in order to improve their biological characteristics. Gas-phase transportation methods were proposed to obtain such materials. To determine the effect of the material of the bottom layer of heterometallic structures, Ir, Pt, and PtIr coatings with a thickness of 1.4–1.5 μm were deposited by metal–organic chemical vapor deposition (MOCVD) on Ti6Al4V alloy discs. Two types of antibacterial components, namely, gold nanoparticles (AuNPs) and discontinuous Ag coatings, were deposited on the surface of these coatings. AuNPs (11–14 nm) were deposited by a pulsed MOCVD method, while Ag films (35–40 nm in thickness) were obtained by physical vapor deposition (PVD). The cytotoxic (24 h and 48 h, toward peripheral blood mononuclear cells (PBMCs)) and antibacterial (24 h) properties of monophase (Ag, Ir, Pt, and PtIr) and heterophase (Ag/Pt, Ag/Ir, Ag/PtIr, Au/Pt, Au/Ir, and Au/PtIr) film materials deposited on Ti-alloy samples were studied in vitro and compared with those of uncoated Ti-alloy samples. Studies of the cytokine production by PBMCs in response to incubation of the samples for 24 and 48 h and histological studies at 1 and 3 months after subcutaneous implantation in rats were also performed. Despite the comparable thickness of the fibrous capsule after 3 months, a faster completion of the active phase of encapsulation was observed for the coated implants compared to the Ti alloy analogs. For the Ag-containing samples, growth inhibition of S. epidermidis, S. aureus, Str. pyogenes, P. aeruginosa, and Ent. faecium was observed.

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Section: Deposition Of Ir Pt and Irpt Metal Coatings And Au And Ag Nanoparticlesmentioning

confidence: 99%

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

et al. 2021

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“…Synthesis of Ir(acac)(CO)2 precursor was carried out according to the procedure described previously in the literature [24] are described in [29]. IR spectrum of Ir(acac)(CO)2 as a pellet in KBr was recorded using a Vertex 80 FTIR spectrometer (see Figure 1b).…”

Section: Methodsmentioning

confidence: 99%

Mechanism of dicarbonyl(2,4-pentanedionato)iridium(I) decomposition on iron surface and in gas phase: Complex experimental and theoretical study

Kovaleva

Кузубов

Vikulova

et al. 2017

Journal of Molecular Structure

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The mechanism of thermal destruction of Ir(acac)(CO)2 as one of the most important MOCVD precursors for Ir coatings deposition was proposed on the footing of the in situ mass spectrometry analysis and quantum chemical modeling.Calculated structural parameters and vibrational spectra of Ir(acac)(CO)2 molecule were found to be in a fairly good agreement with the experimental data.Ir(acac)(CO)2 was found to unlikely decompose in the gaseous phase while its adsorption onto the iron surface leads to major structural distortions easing the bond cleavage, molecule decomposition with subsequent formation of iridium films.

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“…Heat capacity which refers to the energy absorbed or released when the unit mass changes per unit temperature [7] is one of the important thermodynamic properties for optimizing the production process, and it can be used for reliable calculation of enthalpy, entropy, and Gibbs free energy [8,9]. In addition, heat capacity is the inherent characteristic of crystals, which is closely related to its unique composition and crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite

Zheng

Sun

et al. 2020

Journal of Chemistry

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In this paper, in order to understand the thermodynamic properties of natural minerals of pinnoite (MgB2O4·3H2O, Pin) and inderite (Mg2B6O11·15H2O, Ind) deposited in salt lakes, heat capacities of two minerals were measured using a precision calorimeter at temperatures from 306.15 to 355.15 K after the high purity was synthesized. It was found that there are no phase transitions and thermal anomalies for the two minerals, and the molar heat capacities against temperature for Pin and Ind were fitted as Cp,m,pin = −2029.47058 + 16.94666T − 0.04396T2 + 3.89409×10−5T3 and Cp,m,Ind = −30814.43795 + 282.68108T − 0.85605T2 + 8.70708×10−4T 3, respectively. On the basis of molar heat capacities (Cp,m) of Pin and Ind, the thermodynamic functions of entropy, enthalpy, and Gibbs free energy at the temperature of 1 K interval for the two minerals were obtained for the first time.

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Low-temperature heat capacity of Ir(C5H7O2)(C8H12)

Cited by 8 publications

References 21 publications

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

Noble Metals for Modern Implant Materials: MOCVD of Film Structures and Cytotoxical, Antibacterial, and Histological Studies

Mechanism of dicarbonyl(2,4-pentanedionato)iridium(I) decomposition on iron surface and in gas phase: Complex experimental and theoretical study

Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite

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