6159-05-3

Usage

Uses

Used in Electronics Industry:
1,1'-DI-N-HEPTYL-4,4'-BIPYRIDINIUM DIBROMIDE is used as an electron carrier material for the fabrication of electronic devices such as organic light-emitting diodes (OLEDs), supercapacitors, and liquid crystal displays (LCDs). Its efficient charge transport and energy transfer properties contribute to improved device performance and energy efficiency.

Biological Activity

Blocks calcium release from sarcoplasmic reticulum by direct interaction with the ryanodine receptor.

Upstream product

• 553-26-4 4,4'-bipyridine 
• 629-04-9 1-Bromoheptane 

Downstream Products

• 359867-42-8 3-amino-4-bromobenzaldehyde 

Relevant academic research and scientific papers

The Host-Guest Properties Observed between the Viologens and Cyclopentanocucurbit[6]uril

The interactions between cyclopentanocucurbit[6]uril (abbreviated as CyP6Q[6]) and a series of dialkyl-4,4′-bipyridinium and diaryl-4,4′-bipyridinium dicationic guest molecules, where the alkyl group is CH3(CH2)n with n = 0-6 (expressed as G1 to G7) and the aryl group is phenylene (G8) and xylene (G9), have been investigated in aqueous solution using 1H NMR spectroscopy, isothermal titration calorimetry (ITC), and electronic absorption spectroscopy. Our results show that G1 and G2 form 1: 1 host-guest inclusion complexes with CyP6Q[6], in which the bipyridinium core is partially embedded in the cavity of CyP6Q[6]. G3-G9 form 2: 1 dumbbell-type host-guest inclusion complexes, in which the substituents are encapsulated by CyP6Q[6]. At the same time, CyP6Q[6] was compared with several other cucurbit[n]urils (Q[n]s) and their derivatives, such as Q[6], Q[7], and TMeQ[6], which have been reported to interact with this type of guest molecule. In its binding mode, CyP6Q[6] shows many interesting and different properties, and this difference was mainly reflected with G1 and G2.

Highly stable viologens-based electrochromic devices with low operational voltages utilizing polymeric ionic liquids

In this work, we proposed an effective route of introducing poly(ionic liquid) (PIL) gel as electrolyte to suppress dimer formation of viologen radical cation during switching in electrochromic devices (ECDs). The ECDs were fabricated based on ion gels consisting of various viologens, PIL and ferrocene (Fc). We found that incorporation of PIL contributed to the suppression of dimer production. The suppression of dimer formation can provide ECDs with improved colouration efficiencies, faster switching times, longer cycle lives, and potentially reduced costs. The results showed that an excellent cyclic stability over 96% of initial transmittance change after 4000 cycles of switching.

Cathodic electrochromic compound used in electrochromic device, and preparation method thereof

The structural formula of a cathodic electrochromic compound is shown in the description, a pyridine ring in the middle of the cathodic electrochromic compound is connected to any carbon atom in pyridine rings at two sides through a C-C bond; and in the formula, R1 is selected from C2-20 alkyl groups, R2 to R12 are substituent groups on carbon atoms and are respectively independently selected from H, C1-50 alkyl groups, cycloalkyl groups, polycycloalkyl groups, aryl groups, heterocycloalkyl groups, aralkyl groups and alkaryl groups which are free from or contain halogen, N, O, S, Si, P or an unsaturated bond, and X is selected from a methylbenzenesulfonate anion, a tetrafluoroborate anion, a hexafluoroborate anion, a perchlorate anion, a bisoxalatoborate anion, an oxalyldifluroborate anion, a bis(trifluoromethanesulphonyl)imide anion and a tris(trifluoromethanesulfonyl)methyl anion. An electrochromic device using the compound has a long service life and a deep color, and can greatly reduce the visible light transmittance in the power-up state.

Ionic Donor-Acceptor Complexes. The Influence of Electron Donor Properties of Anions on the Structure of 4,4′-Bipyridylium Dications

X-ray diffraction analysis was performed to study the crystal and molecular structure of the molecule of N,N′-diheptyl-4,4′-bipyridylium diperchlorate and various polymorphous modifications of N,N′-dimethyl-4,4′-bipyridylium diiodide, which are very different in their ability to form donor-acceptor complexes. It proved that the absence of charge-transfer interaction in N,N′-diheptyl-4,4′-bipyridylium diperchlorate results in the twisted conformation of the dication, and the presence of charge transfer in the crystals of N,N′-dimethyl-4,4′-bipyridylium diiodide ensures its planar molecular structure, therewith the extent of charge transfer depends on mutual location of molecules. It is shown that the maximum charge transfer in the γ modification is connected with dimeric packing of molecules.

The Synthesis and Electrochemical Study of New Electrochromic Viologen-based Materials

A range of diquaternary salts of 4,4'-bipyridine and 3,8-phenanthroline were prepared and subsequently screened using electrochemical and spectroscopic techniques.It was determined that the stability of the radical film deposited on cathodic reduction of aqueous solutions of these salts may be strongly influenced by symmetry, steric, and electronic factors.From this basis, it was possible to design a viologen, 1,1'-bis-(2-methylbenzyl)-2-methyl-4,4'-bipyridinium dibromide (9), having electrochromic properties for electronic display applications superior to those already in existence.A radical film of mixed composition was found to be less susceptible to ageing effects than films generated from the individual dicationic salts.