18 Years Factory Tris(Hydroxymethyl)Nitromethane - 4,5-Diazafluoren-9-one Cas: 50890-67-0 99% Solid – XD BIOCHEM
18 Years Factory Tris(Hydroxymethyl)Nitromethane - 4,5-Diazafluoren-9-one Cas: 50890-67-0 99% Solid – XD BIOCHEM Detail:
Catalog Number | XD90221 |
Product Name | 4,5-Diazafluoren-9-one |
CAS |
50890-67-0 |
Molecular Formula |
C11H6N2O |
Molecular Weight |
182.1781 |
Storage Details | 2-8°C |
Harmonized Tariff Code | 2933399090 |
Product Specification
Appearance | Solid |
Assay | 99% |
A series of bimetallic complexes of ruthenium(II) bridged by heterocyclic ligands formed by the condensation of 4,5-diazafluoren-9-one with various diamines, hydrazine, 1,4-phenylenediamine, benzidine, and 4,4′-methylenedianiline, results in metal centers separated by various distances. The complexes give rise to metal-to-ligand charge-transfer absorptions in the 450 nm region of the visible spectrum and intraligand pi –> pi transitions in the 300 nm region of the ultraviolet spectrum. The ruthenium(II) centers are oxidized in two closely spaced one-electron processes at potentials more positive than that for Ru(bpy)(3)(2+). The bridging ligands are reduced by two closely spaced one-electron processes at more positive potentials than that for reduction of the coordinated bipyridine ligands ( approximately -1.30 V), although the diazafluorene=N-N=diazafluorene bridging ligand is reduced reversibly in two single-electron steps at E(1/2) values of -0.29 and -0.52 V. After purification by eluting the pure complexes over a silica gel column with various concentrations of 0.10 M NH(4)PF(6) in methanol, emission occurs only in a glassy matrix at 77 K and at low temperatures in solution. The emission lifetimes at 77 K in a 4:1 ethanol:methanol glass are 5 +/- 1 &mgr;s. A variable-temperature emission lifetime study reveals the presence of a low-lying state with DeltaE = approximately 1500 cm(-)(1), and extrapolation to room temperature indicates the emission lifetimes are in the subnanosecond range.
Product detail pictures:
Related Product Guide:
As for competitive prices, we believe that you will be searching far and wide for anything that can beat us. We can state with absolute certainty that for such quality at such prices we are the lowest around for 18 Years Factory Tris(Hydroxymethyl)Nitromethane - 4,5-Diazafluoren-9-one Cas: 50890-67-0 99% Solid – XD BIOCHEM , The product will supply to all over the world, such as: Rome, Canberra, Croatia, Our product quality is one of the major concerns and has been produced to meet the customer's standards. "Customer services and relationship" is another important area which we understand good communication and relationships with our customers is the most significant power to run it as a long term business.
By Karen from Argentina - 2018.09.12 17:18
The factory has advanced equipment, experienced staffs and good management level, so product quality had assurance, this cooperation is very relaxed and happy!
By Danny from Iran - 2017.11.20 15:58