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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of Heterocyclic Chemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: Protein,Hydrogen bonding,Proline,Molybdenum,Polyoxometallates,Hybrid,Keggin,Peptide
- چکیده:
- چکیده انگلیسی: Crystallographic data analyses indicate that three types of prolinium cations, along with two types of hydrogen bonding, produce and stabilize the helical structure of triprolinium 12-phosphomolybdate. There are similarities between this organic-inorganic compound and peptides/proteins. The stronger “conventional” hydrogen bonds and the less common C-H…O attractions play critical roles in generating and stabilizing the DNA-like network.
- انتشار مقاله: 05-03-1395
- نویسندگان: Masoud Mirzaei,Ali R Salimi,Mohammad H. Alizadeh,Hossein Eshtiagh-Hosseini,Hossein Razavi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Heterocyclic Chemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: Protein,Hydrogen bonding,Proline,Molybdenum,Polyoxometallates,Hybrid,Keggin,Peptide
- چکیده:
- چکیده انگلیسی: Crystallographic data analyses indicate that three types of prolinium cations, along with two types of hydrogen bonding, produce and stabilize the helical structure of triprolinium 12-phosphomolybdate. There are similarities between this organic-inorganic compound and peptides/proteins. The stronger “conventional” hydrogen bonds and the less common C-H…O attractions play critical roles in generating and stabilizing the DNA-like network.
- انتشار مقاله: 20-03-1393
- نویسندگان: Hossein Eshtiagh-Hosseini,Masoud Mirzaei
- مشاهده
- جایگاه : پژوهشی
- مجله: Inorganic Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Polyoxometalate,Inorganic-organic hybrid,Phenanthroline,Lanthanoid,X-ray
- چکیده:
- چکیده انگلیسی: The hydrothermal synthesis of two new inorganic-organic hybrid materials in which PDA (PDA = 1,10-phenanthroline-2,9-dicarboxylate) is connected to a well-defined Keggin-type polyoxometalate anion (POM) and a Ln(III) cation (POM = [SiW12O40]4−; Ln = Eu3+ (1), Er3+ (2)), are reported. These hybrids are characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. Single-crystal X-ray analysis reveals that both compounds have been assembled by hydrogen bonding and anion-π interactions among POM, PDA and lattice water units into a three-dimensional (3D) supramolecular structure. Compound 1 is composed of two different cationic layers of Eu(III) clusters with the POMs located in cavities that are created by the Eu-PDA groups. Compound 2 consists of [SiW12O40]4– Keggin-type POMs, where a single {W3O13} triad is decorated by a trinuclear Er(III)-complex.
- انتشار مقاله: 23-04-1398
- نویسندگان: Shadi Derakhshanrad,Masoud Mirzaei,Joel T. Mague
- مشاهده
- جایگاه : پژوهشی
- مجله: Inorganic Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Polymorphism,12-Tungstoborate,L-proline,Inorganic-organic hybrid,Hydrothermal reaction
- چکیده:
- چکیده انگلیسی: A new structure related to previously reported structure of 12-tungstoborate Keggin-type polyoxometalate, K5[BW12O40], was synthesized and its characterization by single crystal X-ray diffraction shows the polymorph structure. Further attempts have been performed to provide three component compounds based on L-proline, lanthanoid cation and K5[BW12O40] (BW12 (II)) under hydrothermal conditions which is rarely reported in hybrid materials rather than other Keggin types. The proposed general structures contain lanthanoid dimers with amino acid bridges and BW12 (II), which characterized by elemental analysis, FT-IR spectroscopy and ICP (Inductively coupled plasma) method. Various types of interactions are established, depending on the POM shape and charge, the amino acid side chain, peptide sequence or protein structure. Experimental conditions such as temperature, acidity, solvent, etc. are also important factors that influence the binding/reactivity of POM with biomolecules, as described recently [13]. This understanding allows the adequate design of the POM-biomolecule couple for tailoring and controlling mechanisms of action such as catalysis, inhibition, and aggregation, or the crystallizing agent.
- انتشار مقاله: 08-05-1396
- نویسندگان: Mina Arefian,Masoud Mirzaei,Hossein Eshtiagh-Hosseini
- مشاهده