603-44-1Relevant academic research and scientific papers
Hydrogen-bond networks in tris(4-hydroxyphenyl)methane and its 1:1 Molecular complex with 4,4′-bipyridine
Aitipamula, Srinivasulu,Nangia, Ashwini,Thaimattam, Ram,Jaskolski, Mariusz
, p. o481-o484 (2003)
In tris(4-hydroxyphenyl)methane (or 4,4′,4″-methanetriyltriphenol), C19H16O 3, molecules are connected by O - H...O hydrogen bonds [O...O = 2.662 (2) and 2.648 (2) A] into two-dimensional square networks that are twofold interpenetrated. In tris(4-hydroxyphenyl)methane-4,4′-bipyridine (1/1), C19H 16O3·C10H8N2, trisphenol molecules form rectangular networks via O - H...O [O...O = 2.694 (3) A] and C - H... O [C...O = 3.384 (3) A] hydrogen bonds. Bipyridine molecules hydrogen bonded to phenol moieties [O...N = 2.622 (3) and 2.764 (3) A] fill the voids to complete the structure.
Metal- And solvent-free synthesis of aniline- And phenol-based triarylmethanes: Via Br?nsted acidic ionic liquid catalyzed Friedel-Crafts reaction
Jaratjaroonphong, Jaray,Saeeng, Rungnapha,Senapak, Warapong,Sirion, Uthaiwan,ponpao, nipaphorn
, p. 22692 - 22709 (2021/07/21)
A beneficial, scalable and efficient methodology for the synthesis of aniline-based triarylmethanes has been established through the double Friedel-Crafts reaction of commercial aldehydes and primary, secondary or tertiary anilines using Br?nsted acidic ionic liquid as a powerful catalyst, namely [bsmim][NTf2]. This protocol was successfully performed under metal- and solvent-free conditions with a broad range of substrates, giving the corresponding aniline-based triarylmethane products in good to excellent yields (up to 99%). In addition, alternative aromatic nucleophiles such as phenols and electron-rich arenes were also studied using this useful approach to achieve a diversity of triarylmethane derivatives in high to excellent yields. This journal is
Control-synthesized multilayer hyperbranched-hyperbranched polyethers with a tunable molecular weight and an invariant degree of branching
Liu, Tuan,Miao, Xuepei,Geng, Xinxin,Xing, An,Zhang, Liangdong,Meng, Yan,Li, Xiaoyu
supporting information, p. 3432 - 3439 (2016/05/09)
A strategy to synthesize multilayer hyperbranched-hyperbranched macromolecules with an invariant degree of branching (DB) and a controllable molecular weight (MW) is realized by taking advantages of competing reactions. The invariant DB and tunable MW lead to hyperbranched molecules with controlled sub-nano to nano pores, which have potential applications in supramolecular capsulation, gas storage, separation, and catalysis. Hyperbranched molecules with a low MW are obtained in a one-pot reaction due to the competing reactions between AB2 monomers. For our systems, hyperbranched molecules with much higher yet controlled MW can be achieved by adding additional batches of the same AB2 monomers. When different AB2 monomers with different spacer lengths are fed alternatively, multilayer core-shell hyperbranched macromolecules with a controlled layer thickness or MW are obtained. More importantly, the multilayer hyperbranched-hyperbranched macromolecules show not only tunable MW but also invariant DB. In addition, it is found that the Tg of core-shell hyperbranched molecules is mainly determined by the outermost layer.
Hyperbranched polyethers with tunable glass transition temperature: Controlled synthesis and mixing rules
Liu, Tuan,Geng, Xinxin,Nie, Yongxing,Chen, Ruoshi,Meng, Yan,Li, Xiaoyu
, p. 30250 - 30258 (2014/08/05)
By taking advantage of competing side reactions, controlled synthesis of a series of homo- and co-polymerized hyperbranched polyethers (HBPEs) is demonstrated using AB2 monomers of different spacer lengths. This reacting system shows good controllability and scalability. More importantly, the degree of branching is found to be insensitive to the molecular weight and spacer length in monomers. Thus, the value and width of Tg can be tuned by varying monomer spacer length, terminal groups, molecular weight, as well as by copolymerization and physical blending. The dependence of T g in binary homopolymer blends on composition and the dependence of Tg in copolymers on monomer ratio are established and compared for the first time. Tg of copolymers obeys the Fox equation, whereas Tg in binary blends only follows the Kwei equation. Copolymerization does not increase the width of Tg. In contrast, the width of T g of binary blends is much broader than that of copolymers, even though the broadening in Tg can be reduced by increasing the polarity of terminal groups. the Partner Organisations 2014.
Branched DNA nanostructures efficiently stabilised and monitored by novel pyrene-perylene 2′-α-l-amino-LNA FRET pairs
Astakhova, I. Kira,Santhosh Kumar,Campbell, Meghan A.,Ustinov, Alexey V.,Korshun, Vladimir A.,Wengel, Jesper
supporting information, p. 511 - 513 (2013/02/23)
Novel pyrene-perylene α-l-LNA FRET pairs described herein effectively detect assembly of 2- and 3-way branched DNA nanostructures prepared by postsynthetic microwave-assisted CuAAC click chemistry. The fluorescent signalling of assembly by internally posi
POLYCARBONATE RESIN COMPOSITION AND FORMED PRODUCT THEREOF
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, (2011/10/13)
In a polycarbonate resin composition containing a polycarbonate resin and a polycarbosilane compound, the use of the polycarbosilane compound modifies the surface properties of the polycarbonate resin composition without adversely affecting the intrinsic characteristics of the polycarbonate resin, such as transparency, heat resistance, and mechanical properties, e.g., impact resistance. A polycarbonate resin composition containing 100 parts by mass of a polycarbonate resin, 0.001 to 1 part by mass of a metal salt compound, and 0.005 to 5 parts by mass of a polycarbosilane compound has significantly improved flame resistance and high transparency and causes markedly reduced outgassing and mold fouling, without losing impact resistance and heat resistance.
Design, synthesis and antitubercular activity of compounds containing Aryl and heteroaryl groups with alkylaminoethyl chains
Panda, Gautam,Parai, Maloy Kumar,Srivastava, Ajay Kumar,Chaturvedi, Vinita,Manju,Sinha, Sudhir
scheme or table, p. 1121 - 1127 (2009/12/26)
Aryl and heteroaryl derivatives with an alkylaminoethyl chain on the hydroxyl group of the benzene ring are prepared and evaluated against Mycobacterium tuberculosis H37RV and showed the activity in the range of 3.12-25 μg/mL. The compounds containing alkylaminoethyl chains on aryl-chromeneyl carbinol do not show good activity. Similarly compounds with bis and tris-alkylaminoethyl chains on aryl and triarylmethane derivatives do not exhibit antitubcrcular activity. Among heteroaryl containing triarylmcthanes (TRAMs), thiophene derivatives with alkylaminoethyl chain on aromatic hydroxyl group have exhibited good antitubercular activity. On the other hand, pyrrole containing TRAMs do not show good activity.
PHOTOSENSITIVE COMPOUND AND PHOTORESIST COMPOSITION INCLUDING THE SAME
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, (2009/07/03)
A photosensitive compound whose size is smaller than conventional polymer for photoresist, and which has well-defined (uniform) structure, and a photoresist composition including the same are disclosed. The photosensitive compound represented by the following formula. Also, the present invention provides a photoresist composition comprising 1 to 85 wt % (weight %) of the photosensitive compound; 0.05 to weight parts of a photo-acid generator with respect to 100 weight parts of the photosensitive compound; and 10 to 5000 weight parts of an organic solvent. In the formula, n is 0 or 1, x is 1, 2, 3, 4 or 5, y is 2, 3, 4, 5 or 6, z is 0, 1, 2, 3 or 4, R, R′ and R″ are independently hydrocarbon group of 1 to 30 carbon atoms, preferably 2 to 20 carbon atoms, and R′″ is a hydrogen atom or hydrocarbon group of 1 to 30 carbon atoms, preferably 2 to 20 carbon atoms.
Catalytic selective bis-arylation of imines with anisole, phenol, thioanisole and analogues
Liu, Cong-Rong,Li, Man-Bo,Yang, Cui-Feng,Tian, Shi-Kai
, p. 1249 - 1251 (2008/12/21)
The first highly efficient double Friedel-Crafts reaction of N-tosyl imines with anisole, phenol, thioanisole and analogues has been developed to produce the corresponding symmetric diarylmethanes and triarylmethanes with high regioselectivity in the presence of a catalytic amount of Bi2(SO 4)3-TMSCl at room temperature. The Royal Society of Chemistry.
The HF/BF3-catalysed reaction of substituted benzenes with carbon monoxide
Willemse, J. Alexander,Bezuidenhoudt, Barend C. B.,Holzapfel, Cedric W.
, p. 2543 - 2550 (2008/02/04)
The HF/BF3-catalysed reactions of phenol and anisole as well as substituted benzenes with CO were investigated as possible routes to commercially important aldehydes. The results confirmed that HF and BF 3 are required in (at least) stoichiometric amounts for effective formylation with CO. With the aim of effecting truly catalytic reaction conditions, the formylation reactions were carried out in ionic liquids. It was shown that phenol is a good substrate for formylation in certain ionic liquids. Georg Thieme Verlag Stuttgart.
