113087-91-5

Upstream product

• 118-74-1 hexachlorobenzene 
• 35204-48-9 Sodium; 4-hydroxy-benzenethiolate 
• 471866-64-5 1,2,3,4,5,6-Hexakis-(4-tert-butoxy-phenylsulfanyl)-benzene 
• 113087-89-1 hexakis(4-methoxy-1-phenylthio)benzene 
• 696-63-9 4-Methoxybenzenethiol 
• 1073-72-9 4-hydroxythioanisole 
• 60852-09-7 4-tert-butoxy-benzenethiol 
• 471866-59-8 tert-butoxy-4-methylsulfanyl-benzene 

Relevant academic research and scientific papers

Reversible Switching between Phosphorescence and Fluorescence in a Unimolecular System Controlled by External Stimuli

Manipulation of the emission properties of pure organic molecules through external stimuli is attractive but challenging. Herein, a dual-emissive hexathiobenzene-based molecule is reported with significant aggregation-induced phosphorescence characteristics, and demonstrates reversible switching among blue, green, and yellow phosphorescence by controlling molecular aggregation state or protonation state. Variation of solvent or pH value manipulates the interconversion between fluorescence and phosphorescence, while the change in protonation state in organic solvent switches two short-lived emissions in a controllable manner. Such a controlled manipulation is achieved by the rational design of combining a twisted structure and the proper arrangement of energy gaps among different excited states. This work provides a new design principle for organic molecules with efficient room-temperature phosphorescence and tunable singlet–triplet emissive properties, and contributes to the design and development of smart materials and intelligent optoelectronic devices.

Multivalent, sulfur-rich PyBox asterisk ligands in asymmetric metal catalysis

Multivalent PyBox asterisk ligand 1 and monovalent ligand 2 are reported. The innovative feature in 1 is a sulfur-rich persulfurated benzene core as a template joining six PyBox units in close proximity. An efficient persulfuration of C6Cl

A multivalent PyBox asterisk ligand

A discrete multivalent PyBox ligand was investigated. An efficient synthesis and the properties of 1 are reported (UV-visible, cyclic voltammetry, NMR, MALDI-Tof). It incorporates a sulfur-rich persulfurated benzene core which was compatible with a metal-

Polyvalent interactions in unnatural recognition processes

The synthesis of two cluster compounds, one containing six secondary dialkylammonium ion centers and the other possessing six benzo-m-phenylene[25] crown-8 (BMP25C8) macrocycles, both appended to hexakis(thiophenyl)benzene cores, is described. The binding of these clusters with complementary mono- and divalent ligands is investigated with NMR spectroscopy to probe polyvalency in these unnatural recognition systems. The ability of the two different families of clusters to bind complementary monovalent ligands is compared with that of the monovalent receptor pair, namely the dibenzylammonium ion and BMP25C8. This comparison is made possible by determining an average association constant (KAVE) for the binding of each recognition site on the cluster with the corresponding monovalent ligand. We have found that the clustering of recognition sites together in one molecule is detrimental to their individual abilities to bind monovalent ligands. In the case of the polyvalent interaction between the hexakisBMP25C8 cluster and divalent dialkylammonium ions, an association constant, KPOLY, was calculated from the value of K AVE determined for the complexation of the individual component recognition sites. This polyvalent interaction is significantly stronger than that associated with the averaged monovalent interactions.

Synthesis and properties of water-soluble asterisk molecules

An asterisk is comprised of six semirigid arms projecting from a benzene nucleus. In the case at hand, asterisks were synthesized with one, two, or three aromatic rings (connected by sulfur atoms) in each of the six arms. A phosphomonoester at the termini of each arm solubilized the asterisks in water. The colloidal properties of these amphiphilic molecules were investigated by UV-vis and fluorescence spectroscopy, calorimetry, light scattering, surface tensiometry, and pulse-gradient spin-echo NMR. Solubility, solubilization, metal binding, and micelle "seeding" experiments were also carried out. Chain-conformation and supramolecular assembly into remarkable molecular "scrolls" were investigated by X-ray analysis and electron microscopy, respectively. One of the more interesting properties of the asterisks is that they remain monomeric in water despite having as many as 19 hydrophobic aromatic rings exposed to the water. The reasons for this behavior, and the possibility of exploiting it for constructing enzyme models free from aggregation equilibria, are discussed.