89803-10-1

Upstream product

• 63488-10-8 4-tert-butylmagnesium bromide 
• 623-27-8 terephthalaldehyde, 
• 253185-03-4 tert-butylbenzene 
• 100-20-9 terephthaloyl chloride 
• 98531-28-3 (4-tert-butyl-phenyl)-{4-[(4-tert-butyl-phenyl)-hydroxy-methyl]-phenyl}-methanol 

Downstream Products

• 911836-41-4 1,4-phenylbis-[1-(4-tert-butylphenyl)methanamine] 
• 348120-50-3 C₃₂H₃₈S₄ 

Relevant academic research and scientific papers

Designing highly fluorescent, arylated poly(phenylene vinylene)s of intrinsic microporosity

Three new polymers containing tetraphenylethylene and diphenyl-dinaphthylethylene cores and their corresponding monomeric model compounds were synthesized and fully characterized aiming to investigate their photoluminescence efficiency, microporosity and Brunauer-Emmett-Teller-derived surface areas (SBET). Comprehensive photophysical characterization was undertaken in the solid state (powder and thin films), in tetrahydrofuran (THF) solution and in mixtures of "good" and "poor" solvent to induce aggregation (THF:water mixtures). Aggregation induced emission (AIE) was found for the tert-butyl-TPE monomer and polymer and diphenyl-dinaphthylethylene monomer with the increase of the water amount in THF:water mixtures and in the solid state. The tert-butyl substituted TPE derivatives display the highest fluorescence quantum yield (?F) values: 0.14 to 0.30 (in powder) and 0.46 to 0.64 in thin films. In contrast, with the diphenyl-dinaphthylethylene (meta and para-phenylene) polymers aggregation caused quenching (ACQ) occurs in THF:water mixtures (?F ≤ 0.011) and in the solid state (?F ≤ 0.012). The microporosity of the soluble conjugated polymers as potential conjugated polymers of intrinsic microporosity (cPIMs) was further investigated. The SBET of the polymers were related to their optical properties. The polymers show an attractive combination of high SBET surface area (417 m2 g-1) and the occurrence of distinct AIE effects for the tert-butyl-TPE polymer while the diphenyl-dinaphthylethylene polymers do not exhibit microporosity (SBET ≤ 17 m2 g-1) and show ACQ behavior.

Macrocyclic chiral receptors toward enantioselective recognition of naproxen

(Chemical Equation Presented) A macrocyclic receptor based on a bischromenylurea and an α,α′-(o,o′-dialkyl)diphenyl-p- xylylenediamine spacer provides a C2 chiral cavity to associate carboxylates by H-bonds. The extent of the selectivity obtain

W(CO)6-Mediated desulfuroligomerization of bis-dithioacetals. New synthesis of substituted oligo(phenylene-vinylenes)

Treatment of bisdithioacetals of 1,4-diaroylbenzenes (4) with W(CO)6 in refluxing chlorobenzene afforded the corresponding substituted oligophenylenevinylenes (OPVs) (5). Average molecular weights determined by GPC indicate that OPVs 5 have 5-13 repetitive substituted phenylenevinylene units with narrow polydispersities. Emission in the blue-green to green region was observed for these OPVs depending on the nature of the substituent. The electron-donating alkoxy substituent shifted the emission to the longer wavelength whereas the electron-withdrawing trifluoromethyl group caused a blue shift in the fluorescence spectra.