Untitled

Onggo, Djulia; Scudder, Marcia L.; Craig, Donald C.; Goodwin, Harold A.

doi:10.1071/ch99128

Cited by 24 publications

(27 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may be due to a disruption in the symmetry within the coordination sphere around the ruthenium centre, arising from steric interactions between this pendant thiophenyl substituent and an adjacent bipyridine auxiliary ligand. [5] This lowering of symmetry can be clearly seen in a comparison of the COSY spectra of [{Ru(bpy) 2 in 22 is reflected in the near-degeneracy of all equivalent bipyridine shifts. When substituted in the 4-position with an oligothiophene substituent, however, red luminescence was observed with lifetimes longer than that of [Ru-(bpy) 3 ] 2+ (see Table 2).…”

Section: Luminescence Propertiesmentioning

confidence: 92%

“…Steric effects between the bridge and the auxiliary bipyridine ligands may alter the coordination symmetry of the metal core, [5] leading to dras-tic shortenings of luminescence lifetimes by opening up fast non-radiative pathways, and minimizing the systems capacity for directed energy/electron transfer. Pappenfus and Mann [6] have reported synthetic and electrochemical studies on a series of 2,2Ј-bipyridine-capped oligothiophene ligands and their Ru II complexes with bridge lengths of 1, 3 and 6 thienyl units, in which the bridge was attached at the 4-position of the bipyridine unit.…”

Section: (L)]mentioning

confidence: 99%

See 1 more Smart Citation

The Role of Isomeric Effects on the Luminescence Lifetimes and Electrochemistry of Oligothienyl‐Bridged Dinuclear Tris(2,2′‐bipyridine)ruthenium(II) Complexes

et al. 2008

View full text Add to dashboard Cite

The luminescence lifetimes (in CH 3 CN at room temperature) and electrochemical potentials (in CH 3 CN) of a range of mono-and bis(bidentate) 2,2Ј-bipyridine-capped oligothiophene-bridged Ru II complexes based on the 6-(2-thienyl)-2,2Ј-bipyridine and 4-(2-thienyl)-2,2Ј-bipyridine motifs have been measured. The redox potentials occurred in a very narrow range and showed only small shifts from that of [Ru(bpy) 3 ] 2+ , which indicates that the inductive effects of the substituents on the 2,2Ј-bipyridine ligands are very similar across this series. In the complexes that incorporated a bithiophene moiety the oxidation of the bithienyl group occurred at higher potentials than the metal-centered Ru

show abstract

Section: Luminescence Propertiesmentioning

confidence: 92%

Section: (L)]mentioning

confidence: 99%

The Role of Isomeric Effects on the Luminescence Lifetimes and Electrochemistry of Oligothienyl‐Bridged Dinuclear Tris(2,2′‐bipyridine)ruthenium(II) Complexes

et al. 2008

View full text Add to dashboard Cite

show abstract

“…5, 6 Previously, we presented studies on the application of bithiazoles as ligands. 7- 9 We are also interested in the effective parameters in spin state and the magnetic properties of Fe-bithiazole complexes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, mechanochromism and photochromism of [Fe(dm4bt)3][FeCl4]2 and [Fe(dm4bt)3][FeBr4]2, along with the investigation of steric influence on spin state

et al. 2011

View full text Add to dashboard Cite

The complexes [Fe(dm4bt)(3)][FeCl(4)](2) (1) and [Fe(dm4bt)(3)][FeBr(4)](2) (2) were prepared from the reaction of 2,2'-dimethyl-4,4'-bithiazole (dm4bt) with FeCl(3)·6H(2)O and FeBr(3), respectively, in methanol. Both complexes were characterized by IR, UV-Vis and (1)H NMR spectroscopy and their structures were studied by single-crystal diffraction. The methylated bithiazole led to high spin Fe(II) centers in the octahedral cation part of complexes 1 and 2 with Fe-N distance of 2.220 Å, in spite of the low spin octahedral Fe(II) complexes with unsubstituted bithiazole ligands. Crystal structure determination of 2 was performed at 90, 120 and 298 K. Temperature reduction to 90 K resulted in a decrease in the Fe-N bond length to 2.206 Å which is still in the range of high spin Fe(II). Complex 1 shows a reversible mechanochromic effect from the crystalline phase to powder form from red to yellow; it also displays reversible photochromism from yellow to green in solution under sunlight. The magnetic behaviour of the complexes was also studied at 2-300 K. The temperature dependence of χ(m)T curves for the two forms of 1, crystal and powder, demands some changes in their magnetic behavior, causing different colors i.e. red and yellow. At low temperatures, χ(m)T decreases where the decrease starts at around 65 K for compound 1, and at around 100 K for compound 2, due to different counterions. The two complexes exhibit antiferromagnetism at around 4 K.

show abstract

“…There are only a few reports in the literature on coordination compounds of Fe(II) with bithiazole [15][16][17][18]. Here we report the synthesis and characterization of an iron complex with 4,4 0 -bithiazole (4,4 0 -bit).…”

Section: Introductionmentioning

confidence: 93%

Synthesis, characterization, and crystal structural study of the iron(II) 4,4′-bithiazole complex [Fe(C6H4N2S2)3]2+(NO3 −)2

2011

View full text Add to dashboard Cite

The complex [Fe(C 6 H 4 N 2 S 2 ) 3 ] 2? (NO 3 -) 2 was prepared from the reaction of 4,4 0 -bithiazole with Fe(NO 3 ) 3 Á9H 2 O in methanol. It was characterized by IR, UV-Vis, luminescence, 1 H NMR and 13 C NMR spectroscopy, and X ray crystallography. The structure was solved in the orthorhombic space group P2 1 2 1 2 1 with a = 12.1500(5), b = 12.8434(6), c = 16.2222(7) Å , V = 2531.43(19) Å 3 , Z = 4, and with wR 2 = 0.0897.

show abstract

Untitled

Cited by 24 publications

References 20 publications

The Role of Isomeric Effects on the Luminescence Lifetimes and Electrochemistry of Oligothienyl‐Bridged Dinuclear Tris(2,2′‐bipyridine)ruthenium(II) Complexes

The Role of Isomeric Effects on the Luminescence Lifetimes and Electrochemistry of Oligothienyl‐Bridged Dinuclear Tris(2,2′‐bipyridine)ruthenium(II) Complexes

Synthesis, characterization, mechanochromism and photochromism of [Fe(dm4bt)3][FeCl4]2 and [Fe(dm4bt)3][FeBr4]2, along with the investigation of steric influence on spin state

Synthesis, characterization, and crystal structural study of the iron(II) 4,4′-bithiazole complex [Fe(C6H4N2S2)3]2+(NO3 −)2

Contact Info

Product

Resources

About