15702-72-4

Basic information

• Product Name: Bis(2,2-bipyridyl)dichloroOsmium(II)
• Synonyms: Bis(2,2-bipyridyl)dichloroOsmium(II);osmium(II) bis(2,2'-bipyridine) dichloride
• CAS NO: 15702-72-4
• Molecular Formula: C₂₀H₁₆Cl₂N₄Os
• Molecular Weight: 312.36784
• Mol File: 15702-72-4.mol
• Article Data: 16

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Bis(2,2-bipyridyl)dichloroOsmium(II)(CAS DataBase Reference)
• NIST Chemistry Reference: Bis(2,2-bipyridyl)dichloroOsmium(II)(15702-72-4)
• EPA Substance Registry System: Bis(2,2-bipyridyl)dichloroOsmium(II)(15702-72-4)

Safety Data

• Hazardous Substances Data: 15702-72-4(Hazardous Substances Data)

Upstream product

• 366-18-7 [2,2]bipyridinyl 
• 98783-94-9 bipyH{OsbipyCl₄} 
• 64122-67-4 2,2'-bipyridyl monohydrate 
• 57288-05-8 [Os(2,2'-bypiridine)Cl₄] 
• 15699-65-7 {Os(bis(2,2'-bipyridine))Cl₂}Cl 

Downstream Products

• 478083-40-8 Osbipy₂C₂O₄*H₂O 

Relevant articles and documents

Osmium bipyridine-containing redox polymers based on cellulose and their reversible redox activity

Thermo-, pH-, and electrochemical-sensitive cellulose graft copolymers, hydroxypropyl cellulose-g-poly(4-vinylpyridine)-Os(bipyridine) (HPC-g-P4VP-Os(bpy)), were synthesized and characterized. The electrochemical properties of the resulting material were investigated via cyclic voltammetry by coating the graft copolymers on the platinized carbon electrode. The results indicated that the electrochemical properties of the graft copolymer modified electrode were responsive to the pH values of the electrolyte solution. The reversible transformation between the active and inactive state originated from the changes in the architecture of the HPC-g-P4VP-Os(bpy) graft copolymer at different pH values. At high pH (e.g., above the pKa of P4VP), the chains of P4VP collapsed, and the electrochemical activity of the electrode was reduced. With immobilization of glucose oxidase (GOx) on the graft copolymer decorated electrode, a biosensor for glucose detection was prepared. The current of the biosensor depended on the glucose concentration in the detected solution and increased with the successive addition of glucose.

ELECTROCHEMILUMINESCENCE OF OSMIUM COMPLEXES. SPECTRAL, ELECTROCHEMICAL, AND MECHANISTIC STUDIES.

This study presents further electrochemical and electrochemiluminescent characterization of phenanthroline and bipyridine complexes of osmium. It is found that a large number of these complexes will give rise to ECL emission, although, in some cases, the observed ECL intensity was much lower than had been anticipated. It is also demonstrated that surface ECL can also be observed from the films of electropolymerized complexes. Though the emission arising from these films is not as intense as that observed from electropolymerized Ru(vinyl-bipyridine)//3**2** plus films, it is much longer lived.

Measurement of the free-energy dependence of interfacial charge-transfer rate constants using ZnO/H2O semiconductor/liquid contacts

The dependence of electron-transfer rate constants on the driving force for interfacial charge transfer has been investigated using n-type ZnO electrodes in aqueous solutions. Differential capacitance versus potential and current density versus potential measurements were used to determine the energetics and kinetics, respectively, of the interfacial electron-transfer processes. A series of nonadsorbing, one-electron, outer-sphere redox couples with formal reduction potentials that spanned approximately 900 mV allowed evaluation of both the normal and Marcus inverted regions of interfacial electron-transfer processes. All rate processes were observed to be kinetically first-order in the concentration of surface electrons and first-order in the concentration of dissolved redox acceptors. The band-edge positions of the ZnO were essentially independent of the Nernstian potential of the solution over the range 0.106-1.001 V vs SCE. The rate constant at optimal exoergicity was observed to be approximately 10-16 cm4 s-1. The rate constant versus driving force dependence at n-type ZnO electrodes exhibited both normal and inverted regions, and the data were well-fit by a parabola generated using classical Marcus theory with a reorganization energy of 0.67 eV. NMR line broadening measurements of the self-exchange rate constants indicated that the redox couples had reorganization energies of 0.64-0.69 eV. The agreement between the reorganization energy of the ions in solution and the reorganization energy for the interfacial electron-transfer processes indicated that the reorganization energy was dominated by the redox species in the electrolyte, as expected from an application of Marcus theory to semiconductor electrodes.

Water-Soluble Osmium Complexes Suitable for use in Luminescence-Based, Hydrogel-Supported Sensors

Osmium transition metal complexes are of particular interest in luminescence-based sensing applications because of their longer wavelength absorptions and emissions, relative to similar ruthenium and rhenium complexes, that allow for inexpensive excitation and minimize interferences from autofluorescence when the sensor is used in biological samples. Reported here are the photophysical properties of a series of water-soluble osmium complexes suitable for use in hydrogel-based sensors: [Os(bpy)2(sulf-dpp)]Cl2, [Os(phen)2(sulf-dpp)]Cl2, [Os(dpp)2(sulf-dpp)]Cl2, and [Os(CO)2Cl2(sulf-dpp)], where bpy is 2,2′-bipyridine, phen is 1,10-phenanthroline, dpp is 4,7-diphenyl-1,10-phenanthroline, and sulf-dpp is bathophenanthrolinedisulfonic acid disodium salt. The family of complexes showed minimal oxygen quenching, making them particularly well-suited for sensing applications in which oxygen concentration varies. Luminescence anisotropy was found to depend more significantly on net dipole moment than hydrodynamic radius of the molecule, and, as expected, excited state lifetime and luminescence anisotropy were highly dependent on the local environment of the reporter molecule. Results obtained for hydrogel-based relative humidity sensors containing [Os(CO)2Cl2(sulf-dpp)] and [Os(bpy)2(sulf-dpp)]Cl2 complexes highlight the significant potential for this class of compounds in a hydrogel-supported luminescence-based sensing approach.

Physical, spectroscopic, and biological properties of ruthenium and osmium photosensitizers bearing diversely substituted 4,4′-di(styryl)-2,2′-bipyridine ligands

Capitalising on the previous identification of a distyryl coordinated Ru(ii) polypyridine complex as a promising photosensitizer for photodynamic therapy, eight new complexes were synthesized by modifications of the ligands or by changing the metal coordinated. We report in this work the effects of these modifications on the physical, spectroscopic, and biological properties of the synthesized complexes. Subtle structural modifications of the distyryl ligand only had a moderate effect on the corresponding complexes' visible light absorption and singlet oxygen quantum yield. These modifications however had a significant effect on the lipophilicity, the cellular uptake and the phototoxicity of the complexes. Although the lipophilicity of the complexes had a somewhat expected effect on their cellular uptake, this last parameter could not be directly correlated to their phototoxicity, revealing other underlying phenomena. Overall, this work allowed identification of two promising ruthenium complexes as photosensitisers for photodynamic therapy and provides some guidance on how to design better photosensitizers. This journal is

One type of dual-wavelength emission, double-heteronuclear metal complex and its preparation method and application

The invention provides a double-wavelength emitting heterobinuclear metal complex as well as a preparation method and application thereof. The heterobinuclear metal complex has the structural general formula: (L1L2)M-L3-M'(L4L5)Ym, wherein M and M' are respectively and independently selected from Ru, Os, Ir and Re, but, M and M' cannot be the same metal at the same time. The heterobinuclear metal complex can be used as an electrogenerated chemiluminescent substance, and the heterobinuclear metal complex or the heterobinuclear metal complex and amines are used as a co-reactant, so that single-wavelength ECL detection can be realized under respective emitting wavelengths, and proportional ECL detection can also be realized under double emitting wavelengths. Particularly, when one of M and M' is Ir, the heterobinuclear metal complex can only be used for specifically dyeing RNA (Ribonucleic Acid), and the heterobinuclear metal complex is remarkably enhanced in fluorescence after being dyed and can be used for RNA nature determination, quantitative detection and relevant fields such as nucleic acid marking, clinic medical diagnosis, blood cell analysis, immunoassay detection and cancer therapy.