16882-08-9

Upstream product

• 619-44-3 methyl 4-iodobenzoate 
• 74-86-2 acetylene 
• 619-42-1 4-methoxycarbonylphenyl bromide 
• 142-45-0 Acetylenedicarboxylic acid 
• 471-25-0 Propiolic acid 
• 75-20-7 calcium carbide 
• 474661-34-2 4-(prop-1-yn-1-yl)benzoic acid methyl ester 
• 33577-98-9 methyl 4-(3-hydroxy-3-methylbut-1-ynyl)benzoate 
• 40742-02-7 dimethyl 4,4′-(1-hydroxy-2-oxoethane-1,2-diyl)dibenzoate 
• 1571-08-0 methyl 4-formylbenzoate 
• 3034-86-4 4-ethynylbenzoic acid methyl ester 
• 51934-41-9 4-iodobenzoic acid ethyl ester 
• 75867-41-3 4-trimethylsilanylethynyl-benzoic acid methyl ester 
• 1066-54-2 trimethylsilylacetylene 

Downstream Products

• 16819-43-5 4,4'-(1,2-ethynediyl)bisbenzoic acid 
• 136118-22-4 hexakis(4-carbomethoxyphenyl)benzene 
• 1208342-01-1 methyl 6-{4-(methoxycarbonyl)phenyl}-7,8-dipropyl-2-naphthoate 
• 1224340-64-0 dimethyl 4,4'-(ethane-1,2-diyl)bis(3-bromobenzoate) 
• 1224340-72-0 4,4'-(ethane-1,2-diyl)bis(3-bromobenzoic acid) 
• 1338085-84-9 C₂₄H₂₈Br₂O₄ 
• 797-21-7 1,2-bis(4-methoxycarbonylphenyl)ethane 
• 36063-07-7 tetramethyl naphthalene-1,2,3,4-tetracarboxylate 
• 15810-16-9 dimethyl 9,10-phenanthrenedicarboxylic acid 
• 1590447-65-6 C₄₀H₃₆N₄O₄S₃ 
• 1590447-66-7 C₃₈H₃₆N₂O₄S₃ 
• 66553-02-4 1,2-bis-(4-methoxycarbonylphenyl)-ethane-1,2-dione 

Relevant academic research and scientific papers

Solvent and substituent effects on the photochemistry of norbornadiene-diarylacetylene pauson-khand adducts

The photochemistry of Pauson-Khand cycloadducts of norbornadiene with a series of bis-aryl alkynes has been studied. Two types of photochemical transformation take place: photorearrangement to tricyclic ketones or photochemical 6π electrocyclization. High

Metal-Organic Frameworks with Hexakis(4-carboxyphenyl)benzene: Extensions to Reticular Chemistry and Introducing Foldable Nets

Nine metal-organic frameworks have been prepared with the hexagon-shaped linker 1,2,3,4,5,6-hexakis(4-carboxyphenyl)benzene (H6cpb) by solvothermal reactions in dimethylformamide (dmf) or dimethylacetamide (dmac) with acetic acid or formic acid as modulat

Synthesis and Selective CO2 Capture Properties of a Series of Hexatopic Linker-Based Metal-Organic Frameworks

Four crystalline, porous metal-organic frameworks (MOFs), based on a new hexatopic linker, 1′,2′,3′,4′,5′,6′-hexakis(4-carboxyphenyl)benzene (H6CPB), were synthesized and fully characterized. Interestingly, two members of this series exhibited

Electrochemical characterization of lithium 4,4′-tolane-dicarboxylate for use as a negative electrode in Li-ion batteries

Lithium 4,4′-tolane-dicarboxylate has been synthesized and examined for use as a negative electrode material in lithium ion batteries. Cycling studies in Swagelok cells, using lithium as a counter electrode, show a reversible capacity of ～200 mAh g-1

Structural studies on inclusion compounds and solvent sorption behavior of gradually elongated wheel-and-axle-type diol hosts featuring lateral benzo[b]thiophene units

Based on the wheel-and-axle design strategy, a series of six new clathrate hosts featuring two di(benzo[b]thien-2-yl)hydroxymethyl units attached to both ends of a central linear building element of varying length have been synthesized and their capability to form crystalline inclusion compounds with a fixed range of organic solvents are reported. X-ray crystal structures of relevant inclusion compounds have been determined and are comparatively discussed involving structural modification of the host molecules. Organic vapor sorption behavior of the host compounds coated as solid films on the quartz crystal of a QCM device has been studied. Significant differences in the affinities towards solvent vapors dependent both on structural and polarity properties of host and solvent are observed, indicating potential application as mass sensitive materials.

Excimer formation in a confined space: Photophysics of ladderphanes with tetraarylethylene linkers

Communication between chromophores is vital for both natural and non-natural photophysical processes. Spatial confinements offer unique conditions to scrutinize such interactions. Polynorbornene- and polycyclobutenebased ladderphanes are ideal model compo

One-step Ethylene Purification from an Acetylene/Ethylene/Ethane Ternary Mixture by Cyclopentadiene Cobalt-Functionalized Metal–Organic Frameworks

The separation of ethylene (C2H4) from a mixture of ethane (C2H6), ethylene (C2H4), and acetylene (C2H2) at normal temperature and pressure is a significant challenge. The sieving effect of pores is powerless due to the similar molecular size and kinetic diameter of these molecules. We report a new modification method based on a stable ftw topological Zr-MOF platform (MOF-525). Introduction of a cyclopentadiene cobalt functional group led to new ftw-type MOFs materials (UPC-612 and UPC-613), which increase the host-guest interaction and achieve efficient ethylene purification from the mixture of hydrocarbon gases. The high performance of UPC-612 and UPC-613 for C2H2/C2H4/C2H6 separation has been verified by gas sorption isotherms, density functional theory (DFT), and experimentally determined breakthrough curves. This work provides a one-step separation of the ternary gas mixture and can further serve as a blueprint for the design and construction of function-oriented porous structures for such applications.

Evidence of a Photoinduced Electron-Transfer Mechanism in the Fluorescence Self-quenching of 2,5-Substituted Selenophenes Prepared through in Situ Reduction of Elemental Selenium in Superbasic Media

A series of new 2,5-disubstituted selenophene derivatives are described from elemental selenium and 1,3-diynes in superbasic media. The activation of elemental selenium in a KOH/DMSO system allows cyclization with conjugated diynes at room temperature. The cyclization reaction is extended to a broad range of functional groups, for which photophysics were experimentally and theoretically investigated. The selenophene derivatives present absorption maxima in the UV-A region and fluorescence emission in the violet-to-blue region. Fluorescence decay profiles were obtained showing a monoexponential decay with fast fluorescence lifetimes (～0.118 ns), as predicted by the Strickler-Berg relations. In general, in both investigations, no dependence on the solvent polarity on the absorption and emission maxima location was observed. On the other hand, solvents and substituents are shown to play a role in the fluorescence quantum yield values. In addition, a fluorescence self-quenching behavior could be observed, related to a photoinduced electron-transfer mechanism. Theoretical calculations performed at the MP2/ADC(2)/cc-pVDZ level of theory were performed in order to investigate the photophysical features of this series of selenophene derivatives.

Robust Alkyne Metathesis Catalyzed by Air Stable d2Re(V) Alkylidyne Complexes

We report in this communication the first example of catalytic alkyne metathesis reactions mediated by well-defined non-d0 alkylidyne complexes. The air-stable d2 Re(V) alkylidyne complex Re4, bearing two PO-chelating ligands and a labile pyridine ligand, could catalyze homometathesis of internal alkynes with a broad substrate scope, including alcohols, amines, and even carboxylic acids. The catalyst can tolerate heating, air, and moisture in both solid and solution states, and the catalytic metathesis reactions could proceed normally in wet solvents.

Iodine-catalysed transfer hydrogenation of a carbon-carbon σ-bond with water

Iodine catalysed the transfer hydrogenation of a benzylic C-C σ-bond in [2.2]paracyclophane with water to yield 4,4′-dimethylbibenzyl. The C-C σ-bond was first cleaved by homolytic substitution with iodine radicals to produce a 4,4′-diiodomethylbibenzyl i