1189377-77-2

Usage

Structure

Symmetrical diyne composed of two pyridine rings attached to a phenyl ring at each end, connected by a carbon-carbon triple bond

Usage

Building block for creating complex organic molecules, synthesis of various organic compounds, potential applications in optoelectronic devices, and as a fluorescent probe in biological imaging

Physical state

Yellow solid

Melting point

High melting point (specific value not provided)

Stability

Relatively stable under standard laboratory conditions

Upstream product

• 39795-60-3 4-(4-bromophenyl)pyridine 
• 589-87-7 1,4-bromoiodobenzene 
• 55022-46-3 4-methyl-N-prop-2-ynylbenzenesulfonamide 
• 920-46-7 Methacryloyl chloride 
• 1692-15-5 4-pyridylboronic acid 
• 2789-89-1 1,2-bis(4-bromophenyl)acetylene 
• 5405-28-7 1,2-di(4-bromophenyl)-1,2-dibromoethane 
• 98-80-6 phenylboronic acid 

Downstream Products

• 1189377-78-3 1,2-bis(4-pyridyl)hexaphenylbenzene 
• 1352050-08-8 2,3,4,5-tetrakis(4-(4-pyridyl)phenyl)cyclopenta-2,4-dienone 
• 1352050-09-9 1,2,3,4,5-pentakis(4-pyridyl)-hexaphenylbenzene 
• 1352050-00-0 1,2-bis(4-(4-pyridyl)-phenyl)ethane-1,2-dione 
• 1352050-06-6 1,2,3,4-tetrakis(4-pyridyl)-hexaphenylbenzene 
• 1352050-03-3 1,2,3,-tris(4-pyridyl)-hexaphenylbenzene 

Relevant academic research and scientific papers

Surface Engineering of ITO Substrates to Improve the Memory Performance of an Asymmetric Conjugated Molecule with a Side Chain

Organic multilevel random resistive access memory (RRAM) devices with an electrode/organic layer/electrode sandwich-like structure suffer from poor reproducibility, such as low effective ternary device yields and a wide threshold voltage distribution, and improvements through organic material renovation are rather limited. In contrast, engineering of the electrode surfaces rather than molecule design has been demonstrated to boost the performance of organic electronics effectively. Herein, we introduce surface engineering into organic multilevel RRAMs to enhance their ternary memory performance. A new asymmetric conjugated molecule composed of phenothiazine and malononitrile with a side chain (PTZ-PTZO-CN) was fabricated in an indium tin oxide (ITO)/PTZ-PTZO-CN/Al sandwich-like memory device. Modification of the ITO substrate with a phosphonic acid (PA) prior to device fabrication increased the ternary device yield (the ratio of effective ternary device) and narrowed the threshold voltage distribution. The crystallinity analysis revealed that PTZ-PTZO-CN grown on untreated ITO crystallized into two phases. After the surface engineering of ITO, this crystalline ambiguity was eliminated and a sole crystal phase was obtained that was the same as in the powder state. The unified crystal structure and improved grain mosaicity resulted in a lower threshold voltage and, therefore, a higher ternary device yield. Our result demonstrated that PA modification also improved the memory performance of an asymmetric conjugated molecule with a side chain.

Self-assembling molecular capsules based on α,γ-cyclic peptides

A new capsule based on a β-sheet self-assembling cyclic peptide with the ability to recognize and release several guests is described. The host structure is composed of two self-complementary α,γ-cyclic peptides bearing a Zn porphyrin cap that is used for the selective recognition of the guest. The two components are linked through two dynamic covalent bonds. The combination of binding forces, including hydrogen bonding, metal coordination, and dynamic hydrazone bonds, allows the reversible recognition of long bipyridine guests. The affinity for these ligands showed a strong dependence on the guest length. Delivery of the encapsulated ligand can be achieved by hydrolysis of hydrazones to disrupt the sandwich complex structure.

Stepwise effective molarities in porphyrin oligomer complexes: Preorganization results in exceptionally strong chelate cooperativity

Complexes of zinc porphyrin oligomers with multivalent ligands can be denatured by adding a large excess of a monodentate ligand, such as quinuclidine. We have used denaturation titrations to determine the stabilities of the complexes of a cyclic zinc-porphyrin hexamer with multidentate ligands with two to six pyridyl coordination sites. The corresponding complexes of linear porphyrin oligomers were also investigated. The results reveal that the stepwise effective molarities (EMs) for the third through sixth intramolecular coordination events with the cyclic hexamer are extremely high (EM = 10 2-103 M), whereas the values for the linear porphyrin oligomers are modest (EM ? 0.05 M). The speciation profiles for the denaturation reactions demonstrate that intermediate species are not significantly populated and that these equilibria are well described by a highly cooperative two-state model.

Probing flexibility in porphyrin-based molecular wires using double electron electron resonance

A series of butadiyne-linked zinc porphyrin oligomers, with one, two, three, and four porphyrin units and lengths of up to 75 A, have been spin-labeled at both ends with stable nitroxide TEMPO radicals. The pulsed EPR technique of double electron electron