1762-40-9

Usage

Uses

Used in Organic Electronics:
2,2''-Bi-4-stilbazole is used as a component in organic electronics for its strong fluorescence and conjugated structure, which contribute to the development of organic semiconductors and enhance the performance of electronic devices.
Used in Optoelectronic Devices:
2,2''-Bi-4-stilbazole is used as a material in optoelectronic devices for its strong fluorescence and potential in the development of organic semiconductors, which can improve the efficiency and functionality of these devices.
Used in Metal Complexes as a Coordination Ligand:
2,2''-Bi-4-stilbazole is used as a coordination ligand in metal complexes for its unique structural properties, which can lead to the formation of new compounds with potential applications in various fields.
Used in Materials Science and Technology:
2,2''-Bi-4-stilbazole is used as a promising candidate in the advancement of materials science and technology due to its versatile properties, which can contribute to the development of new materials with improved performance and functionality.

Upstream product

• 1134-35-6 4,4'-dimethyl-2,2'-bipyridines 
• 100-52-7 benzaldehyde 

Downstream Products

• 106734-90-1 [((C₆H₅(CH)2C₅H₃N)2)3Ru]⁽²⁺⁾*2PF₆^(1-)=[((C₆H₅(CH)2C₅H₃N)2)3Ru](PF₆)2 
• 106761-56-2 [((C₆H₅(CH)2C₅H₃N)2)3Fe]⁽²⁺⁾*2PF₆^(1-)=[((C₆H₅(CH)2C₅H₃N)2)3Fe](PF₆)2 
• 106734-92-3 [((C₆H₅(CH)2C₅H₃N)2)((C₅H₄N)2)2Ru]⁽²⁺⁾*2PF₆^(1-)=[((C₆H₅(CH)2C₅H₃N)2)((C₅H₄N)2)2Ru](PF₆)2 
• 106735-11-9 [((C₆H₅(CH)2C₅H₃N)2)3Os]⁽²⁺⁾*2PF₆^(1-)=[((C₆H₅(CH)2C₅H₃N)2)3Os](PF₆)2 
• 106735-28-8 [((C₆H₅(CH)2C₅H₃N)2)Re(CO)3Cl] 
• 106735-15-3 [((C₆H₅(CH)2C₅H₃N)2)((C₅H₄N)2)2Os]⁽²⁺⁾*2PF₆^(1-)=[((C₆H₅(CH)2C₅H₃N)2)((C₅H₄N)2)2Os](PF₆)2 
• 1762-39-6 4,4′-diphenylethyl-2,2′-bipyridine 
• 86494-27-1 Mo(CO)4C₁₀H₆N₂(CHCHC₆H₅)2 

Relevant academic research and scientific papers

Influence of the nature of the absorption band on the potential performance of high molar extinction coefficient ruthenium(II) polypyridinic complexes as dyes for sensitized solar cells

When tested in solar cells, ruthenium polypyridinic dyes with extended π systems show an enhanced light-harvesting capacity that is not necessarily reflected by a high (collected electrons)/(absorbed photons) ratio. Provided that metal-to-ligand charge transfer bands, MLCT, are more effective, due to their directionality, than intraligand (IL) π-π* bands for the electron injection process in the solar cell, it seems important to explore and clarify the nature of the absorption bands present in these types of dyes. This article aims to elucidate if all the absorbed photons of these dyes are potentially useful in the generation of electric current. In other words, their potentiality as dyes must also be analyzed from the point of view of their contribution to the generation of excited states potentially useful for direct injection. Focusing on the assignment of the absorption bands and the nature of the emitting state, a systematic study for a series of ruthenium complexes with 4,4′-distyryl-2,2′-dipyridine (LH) and 4,4′-bis[p- (dimethylamino)-α-styryl]-2,2′-bipyridine (LNMe2) "chromophoric" ligands was undertaken. The observed experimental results were complemented with TDDFT calculations to elucidate the nature of the absorption bands, and a theoretical model was proposed to predict the available energy that could be injected from a singlet or a triplet excited state. For the series studied, the results indicate that the percentage of MLCT character to the anchored ligand for the lower energy absorption band follows the order [Ru(deebpy)2(LNMe2)](PF6)2 > [Ru(deebpy)2(LH)](PF6)2 > [Ru(deebpy)(LH)2](PF6)2, where deebpy is 4,4′-bis(ethoxycarbonyl)-2,2′-bipyridine, predicting that, at least from this point of view, their efficiency as dyes should follow the same trend.

New cyclometalated Ir(III) complexes with bulky ligands with potential applications in LEC devices: Experimental and theoretical studies of their photophysical properties

In the present work we report the synthesis and the electrochemical, photoluminescence and electroluminescence properties of two new Ir(iii) cyclometalated complexes denoted as [Ir(F2ppy)2L1](PF6) and [Ir(F2ppy)2L2](PF6), where F2ppy is 2-(2,4-difluorophenyl)pyridine, L1 is 4,4′-diphenylethyl-2,2′-bipyridine and L2 is 4,4′-bis[2-[4-(1,1-dimethylethoxy)phenyl]ethyl]-2,2′-bipyridine. The photoluminescence spectra in solution for both the complexes are characterized by wavelength emission maxima at around 510 nm and higher quantum yields. In the solid state, the emission spectrum of the complex with L2 is characterized by higher emission intensity than the [Ir(F2ppy)2L1](PF6) complex. This behavior is explained as due to the effect of the more bulky structure of the L2 ligand, which prevents, in a more efficient way compared to the complex with L1, the auto-quenching processes in the solid packing. DFT calculations were performed to understand the photophysical behavior of the complexes, and an excellent agreement between experimental and theoretical data was observed. For the complex with L2, the electronic density of the HOMO is located in the chain and phenyl fragment of this ligand. This behavior is quite different from that expected for a typical Ir(iii) cyclometalated complex, where the electron density of the HOMO is located on the metal (t2g orbitals)/phenyl fragment of the cyclometalating ligand. In spite of these differences, both complexes are good emitters, and in both cases the emission comes from a single T1 emitter state with the contribution of the MLCT and LLCT. In order to get a first approximation of the behavior of these complexes in LEC (light emitting electrochemical cells) applications, the electroluminescence spectra with an applied bias of 12 V were obtained. Both the complexes show yellow-green emissions at around 550 nm, with (0.41, 0.48) and (0.45, 0.48) CIE coordinates for [Ir(F2ppy2)2L1](PF6) and [Ir(F2ppy2)2L2](PF6), respectively.

Study of the effect of aliphatic and π-conjugated systems on the photophysical properties of polypyridinic Ruthenium II complexes as potential semiconductor materials for iTMC type LEC

The photophysical properties of polypyridinic Ruthenium complexes, as potential semiconductor materials for iTMC (ionic transition metal complex) type LECs have been studied. Substituted 2,2′-bipyridine ligands were used to study the effects of conjugated and aliphatic chains on the properties of the complexes, especially on the photophysical properties. Specifically, the N^N type ligands 4,4′-bis[2-hydroxy-2-(phenyl)ethyl]-2,2′-bipyridine (1), 4,4′-bis(α-styrene)-2,2′-bipyridine (2) and 4,4′-diphenylethyl-2,2′-bipyridine (3) were synthesized, and used to prepare the corresponding [RuII(bpy)2(N^N)](PF 6)2 complexes. All three ligands contain a phenyl group as substituent for bpy, but with different residues as bridges between both: ligands 1 and 3 have free rotating connecting groups, while 2 is more rigid due to the styryl double bond. From the achieved results it was observed that, as expected, a conjugation on the ligand produces complexes with bands shifting toward lower energy regions, due to the electronic communication between the phenyl and bipyridine groups. On the contrary, in the absence of this conjugation, as is the case of the complexes with ligands 1 and 3, absorptions and emissions bands are very similar to the corresponding complex with unsubstituted bpy. Therefore, complexes with ligands 1 and 3 seem to be promising for LEC devices, due to the free rotations of the connecting aliphatic chain. This should preserve the properties as emission color, and advantages of Ru(bpy)32+ photoluminescence, but increasing the efficiency when used in a device, avoiding crystallization and diminishing self-quenching processes.

New iridium cyclometallated complexes with potential application in OLED

The photophysical and electrochemical properties of cyclometallic cationic iridium complexes that also contain bipyridine type ligands have been investigated in this work. The effect on the photophysical properties of the complexes on the presence of aliphatic long chain or branched substitution was analyzed. The complexes show photoluminescence maxima in the green-blue region of the visible spectrum, with acceptable quantum yields and lifetime, showing in this way potentiality to be tested in OLED devices.