Molecular design of a proton-induced molecular switch based on rod-shaped Ru dinuclear complexes with bis-tridentate 2,6-bis(benzimidazol-2-yl)pyridine derivatives

Haga, Masa‐aki; Takasugi, Tomohiro; Tomie, Akihiro; Ishizuya, Masahide; Yamada, Tetsuyuki; Hossain, Md. Delower; Inoue, Miyao

doi:10.1039/b300130j

Cited by 125 publications

(73 citation statements)

References 49 publications

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“…Thus, the luminescence behavior of (1) is similar to that of [Ru(terpy) 2 ] 2+ , but different from that of [Ru(bbpH 2 ) 2 ] 2+ . (5) [Ru(terpy) 2 ] 2+ 1.28 c (6) [Ru(bpy) 3 ] 2+ 1.27 d (7) [Ru(bpy) 2 (BibzImH 2 )] 2+ 1.12 d (8) [Ru(bpy)(BibzImH 2 ) 2 ] 2+ 0.91 d (9) [Ru(BibzImH 2 ) 3 ] 2+ 0.80 d (10) [Ru(BiImH 2 ) 3 ] 2+ 0.54 d (11) [Ru(bpy)(BiImH 2 ) 2 ] 2+ 0.80 d (12) [Ru(bpy) 2 …”

Section: Uv-visible and Luminescence Spectroscopymentioning

confidence: 99%

Synthesis, crystal structure determination, spectroscopic and electrochemical studies of trans-[Ru(PPh3)2(bbpH2)Cl]Cl·CHCl3·H20 (bbpH2=2,6-bis(benzimidazolyl) pyridine) – an infinite double columnar supramolecule in the solid state

Mishra

Naskar

Chattopadhyay

et al. 2005

Transition Met Chem

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Synthesis, crystal structure determination, spectroscopic and electrochemical studies of trans-[Ru(PPh 3 ) 2 (bbpH 2 )Cl]ClAECHCl 3 AEH 2 0 (bbpH 2 ¼ 2,6-bis(benzimidazolyl) pyridine) -an infinite double columnar supramolecule in the solid state Abstract The synthesis, crystal structure, redox and spectroscopic properties of trans-[Ru(bbpH 2 )(PPh 3 ) 2 Cl]Cl are reported. In the crystalline solvate trans-[Ru(bbpH 2 )(PPh 3 ) 2c Cl]ClAECHCl 3 AEH 2 O, the molecular components are connected by strong intermolecular hydrogen bonding to form an infinite double column.

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Section: Uv-visible and Luminescence Spectroscopymentioning

confidence: 99%

Synthesis, crystal structure determination, spectroscopic and electrochemical studies of trans-[Ru(PPh3)2(bbpH2)Cl]Cl·CHCl3·H20 (bbpH2=2,6-bis(benzimidazolyl) pyridine) – an infinite double columnar supramolecule in the solid state

Mishra

Naskar

Chattopadhyay

et al. 2005

Transition Met Chem

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“…[55] When phosphonate anchor groups were incorporated at both ends of the rod-shaped Ru complexes,s table-layer structures were obtained on as olid surface via zirconium(IV)-phosphonate bonds. [47] The resulting multilayer films, containing Ru complexes, displayed stable redox responses on ITO electrodes, as well as long-distanceE Tp roperties when incorporated between two electrodes. [56] In this study,t wo rod-shaped dinuclear Ru complexes,c ontaining either tetra(pyridyl)-pyrazine (Ru-NP)o rt etra(pyridyl)-benzene (Ru-CP)l inkersw ith four phosphonate anchors at both ends (Scheme 1), were synthesized in order to introduce ag radient into the Ru-NP j Ru-CP heterojunction, which should arise from the substantial potential difference between Ru-NP and Ru-CP.…”

Section: Introductionmentioning

confidence: 99%

Photoresponsive Molecular Memory Films Composed of Sequentially Assembled Heterolayers Containing Ruthenium Complexes

Nagashima

Ozawa

Suzuki

et al. 2015

Chemistry A European J

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Photoresponsive molecular memory films were fabricated by a layer-by-layer (LbL) assembling of two dinuclear Ru complexes with tetrapodal phosphonate anchors, containing either 2,3,5,6-tetra(2-pyridyl)pyrazine or 1,2,4,5-tetra(2-pyridyl)benzene as a bridging ligand (Ru-NP and Ru-CP, respectively), using zirconium phosphonate to link the layers. Various types of multilayer homo- and heterostructures were constructed. In the multilayer heterofilms such as ITO||(Ru-NP)m |(Ru-CP)n , the difference in redox potentials between Ru-NP and Ru-CP layers was approximately 0.7 V, which induced a potential gradient determined by the sequence of the layers. In the ITO||(Ru-NP)m |(Ru-CP)n multilayer heterofilms, the direct electron transfer (ET) from the outer Ru-CP layers to the ITO were observed to be blocked for m>2, and charge trapping in the outer Ru-CP layers became evident from the appearance of an intervalence charge transfer (IVCT) band at 1140 nm from the formation of the mixed-valent state of Ru-CP units, resulting from the reductive ET mediation of the inner Ru-NP layers. Therefore, the charging/discharging ("1"and "0") states in the outer Ru-CP layers could be addressed and interconverted by applying potential pulses between -0.5 and +0.7 V. The two states could be read out by the direction of the photocurrent (anodic or cathodic). The molecular heterolayer films thus represent a typical example of a photoresponsive memory device; that is, the writing process may be achieved by the applied potential (-0.5 or +0.7 V), while the readout process is achieved by measuring the direction of the photocurrent (anodic or cathodic). Sequence-sensitive multilayer heterofilms, using redox-active complexes as building blocks, thus demonstrate great potential for the design of molecular functional devices.

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“…Among cyclometallated complexes, the pincer-type species bearing mono-or di-or trianionic terdentate backbone have emerged as a unique class of organometallic compounds mostly owing to their applications not only as efficient homogeneous catalysts in various chemical transformations 9-11 but also as sensors and molecular switches. [12][13][14] The rigid nature and the strong coordination ability of the pincer ligands make their complexes robust and less sensitive to air and moisture. 15, 16 We have reported some cyclometallated platinum group metal ion complexes with pincer-like CNOdonor Schiff bases derived from aroylhydrazines and various mono-and polycyclic aromatic aldehydes.…”

Section: Introductionmentioning

confidence: 99%

Cyclometallated ruthenium(II) carbonyl complexes with 1-pyrenaldehyde 4-R-3-thiosemicarbazones: Regioselective ruthenation of the 1-pyrenyl group

Prabhu

Pal

2015

J Chem Sci

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A facile method for the synthesis of a series of cyclometallated ruthenium(II) carbonyl complexes with 1-pyrenaldehyde 4-R-3-thiosemicarbazones (H 2 L n where the two H's represent the dissociable thioamide and pyrenyl protons; R = H, Me and Ph) has been described. The characterization of the complexes having the general molecular formula trans-[Ru(L n )(CO)(EPh 3 ) 2 ] (where E = P or As) were accomplished by elemental (CHN) analysis, magnetic susceptibility and spectroscopic (ESI-MS, IR, UV-Vis, emission and 1 H-NMR) measurements. Electronic spectra of the complexes display multiple strong absorptions in the range 440-224 nm due to intraligand transitions. All the complexes exhibit emission bands that are characteristic of ligand centred emissive states. X-ray diffraction studies with representative complexes reveal a pincer-like 5,5-membered fused chelate rings forming CNS coordination mode of the thiosemicarbazonate ligand (L n ) 2− via regioselective activation of 1-pyrenyl ortho C-H and formation of a distorted octahedral C 2 NSE 2 coordination sphere around the ruthenium(II) centre.

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Molecular design of a proton-induced molecular switch based on rod-shaped Ru dinuclear complexes with bis-tridentate 2,6-bis(benzimidazol-2-yl)pyridine derivatives

Cited by 125 publications

References 49 publications

Synthesis, crystal structure determination, spectroscopic and electrochemical studies of trans-[Ru(PPh3)2(bbpH2)Cl]Cl·CHCl3·H20 (bbpH2=2,6-bis(benzimidazolyl) pyridine) – an infinite double columnar supramolecule in the solid state

Synthesis, crystal structure determination, spectroscopic and electrochemical studies of trans-[Ru(PPh3)2(bbpH2)Cl]Cl·CHCl3·H20 (bbpH2=2,6-bis(benzimidazolyl) pyridine) – an infinite double columnar supramolecule in the solid state

Photoresponsive Molecular Memory Films Composed of Sequentially Assembled Heterolayers Containing Ruthenium Complexes

Cyclometallated ruthenium(II) carbonyl complexes with 1-pyrenaldehyde 4-R-3-thiosemicarbazones: Regioselective ruthenation of the 1-pyrenyl group

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