[A theoretical study of the influence of interaction between transition metal atoms and carbon monoxide on infrared and Raman intensities of the C--O stretching vibration]. | LitMetric
Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China.
Published: March 2005
AI Article Synopsis
Article Abstract
The structures and the spectral properties of the transition metal M-CO complexes have been investigated by performing the calculation of the hybrid density functional theory approach. The calculated results show that for each M-CO complex the infrared intensity of the C--O stretching mode is significantly larger than that of the M-C stretching mode and the bending modes. The Raman scattering factor of the C--O stretching mode is the largest among three modes. Comparison of the calculated results indicates that the C--O modes of M-CO complexes, the metal atom of which belongs to the fourth periodic metals and the Cu group, have larger Raman scattering factors than those in the other M-CO comnplexes.
In the present investigation, 13% ± 0.84 of the extracted and purified phycocyanin from Phormidium versicolor was obtained, with a purity of 0.69 following dialysis.
Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand.
The development of biodegradable active packaging is a relevant topic demanding the development of film properties, biodegradability, and the potential to preserve food quality. This study aimed to develop thermoplastic starch (TPS) blended with polybutylene adipate-co-terephthalate (PBAT) films via blown-film extrusion containing ascorbyl palmitate (AP) and sodium ascorbyl phosphate (SAP) as antioxidants. The morphology, mechanism, and barrier and antioxidant properties of the films were analyzed to determine the presence of AP, SAP, and their interaction effect on the film properties.
Department of Mathematics and Natural Sciences, Faculty of Tarbiyah, Institut Agama Islam Negeri (IAIN) Kendari, Kota Kendari, Southeast Sulawesi 93116 Indonesia.
Antibacterial agent based on modification of () extract into CQDs@ has been successfully synthesized and applied against and . plants were obtained from Buton Island, Southeast Sulawesi-Indonesia, and used as precursors for Carbon Quantum Dots (CQDs). In the synthesis, the dried leaves of were macerated, and then the filtrate was modified hydrothermally in a Teflon-lined stainless steel autoclave.
Strong coupling between the molecular vibrations and electromagnetic fields of light confined to an infrared cavity leads to the formation of vibro-polaritons - quasi-particles thought to provide the means to control the rates of chemical reactions inside a dark cavity. Despite the mechanisms indicating how vibrational coupling to the vacuum fields can affect the reaction rates are still not well understood, it has been recently demonstrated that the formation of the polariton states alters the ultrafast relaxation dynamics of the strongly coupled system. The relaxation dynamics in molecules, which is known to be important for the chemical reactivity, is directed by anharmonic couplings involving multiple intra- and inter-molecular vibrational degrees of freedom.
The intermediate phase produced by the complexation of metal ions and solvent molecules usually occurs in the crystallization process of perovskite single crystal or film. Effective monitoring of intermediate-phase evolution is beneficial to the control of crystal quality. However, it is difficult to realize.
