70818-22-3Relevant academic research and scientific papers
Versatile soluble oligomeric styrene supports for peptide synthesis
Erapalapati, Venkataramana,Madhavan, Nandita
, p. 2501 - 2509 (2015)
Soluble oligomeric styrene supports are reported here with high loading capacities of 1.5-1.6 mmol/g similar to resins used in solid phase peptide synthesis. Oligoether and alkyl chains are incorporated into the scaffold to improve the support solubility
Bichromophoric pyrazoline derivative with solvent-selective photoluminescence quenching
Chibac, Andreea L.,Roman, Gheorghe,Cojocaru, Corneliu,Shova, Sergiu,Sacarescu, Gabriela,Simionescu, Mihaela,Sacarescu, Liviu
, p. 156 - 163 (2019)
The quenching of fluorescence in the presence of chloromethanes, which is an unprecedented effect for pyrazolines, has been evidenced for the first time in the case of 1,3-diphenyl-5-{4-[(4-vinylbenzyl)oxy]phenyl}-4,5-dihydropyrazole. The detailed synthesis of this aryl trisubstituted pyrazoline that combines two chromophoric units in a non-conjugated manner is presented. The compound has been extensively characterized from a structural point of view, and its crystal structure has been determined by single crystal X-ray crystallography. The fluorescence study has evidenced the particular behavior of this pyrazoline derivative in solutions of chloromethanes, and the insight gained from the experimental data has been useful in elaborating a plausible fluorescence quenching mechanism. The investigated compound was modeled by Density Functional Theory (DFT) to point out the particularities of the electron transitions in gas phase as well as in the implicit solvents. Also, the HOMO-LUMO energy gap, mapped electrostatic potential, electronic density, dipole moment and polarizability have been reported for the pyrazoline derivative.
Efficient monochromatic red-light-emitting PLEDs based on a series of nonconjugated Eu-polymers containing a neutral terpyridyl ligand
Yang, Chaolong,Xu, Jing,Zhang, Yunfei,Li, Yinwen,Zheng, Jian,Liang, Liyan,Lu, Mangeng
, p. 4885 - 4901 (2013)
Three novel Eu-polymers containing hole transporting units and light-emitting units in the main chain have been designed and synthesized via radical copolymerization of N-vinylcarbazole and polymerizable Eu(TTA) 3vinyl-tpy, where TTA is 2-theno
Asymmetric Cu-catalyzed Henry reaction using chiral camphor Schiff bases immobilized on a macromolecular chain
Zhang, Kaihua,Sun, Jialin,Xu, Jingwen,Li, Gaoqiang,Xu, Feng
supporting information, p. 1819 - 1824 (2019/06/18)
Immobilized catalysts have attracted chemists’ attention for long time because of convenient recycling, which is very important for some special catalyst even immobilizations accompanying the decrease of catalytic activity and selectivity. Our group focus
Star-shaped polymer PFStODO by atom transfer radical polymerization: Its synthesis, characterization, and fluorescence property
Gu, Pei-Yang,Lu, Cai-Jian,Xu, Qing-Feng,Ye, Gao-Jie,Chen, Wei-Qiang,Duan, Xuan-Ming,Wang, Li-Hua,Lu, Jian-Mei
scheme or table, p. 480 - 487 (2012/04/17)
A novel monomer bearing with pyrazoline chromophore, 3-(4-fluorophenyl)-1- phenyl-5-(4-(4-vinylbenzyloxy)phenyl-4,5-dihydro-1H-pyrazole (FStODO), was synthesized, and its atom transfer radical polymerization initiated by a tetrafunctional initiator, penta
The synthesis and NLO properties of 1,8-naphthalimide derivatives for both femtosecond and nanosecond laser pulses
Ye, Gao-Jie,Zhao, Ting-Ting,Jin, Zheng-Neng,Gu, Pei-Yang,Mao, Jia-Yuan,Xu, Qing-Hua,Xu, Qing-Feng,Lu, Jian-Mei,Li, Na-Jun,Song, Yin-Ling
scheme or table, p. 271 - 277 (2012/05/04)
Four 1,8-naphthalimide derivatives were synthesized for new nonlinear optical(NLO) materials. Hydrazone group as a p-π structure was introduced into the molecule to extend conjugation and produce NLO properties. Their linear and nonlinear optical (NLO) properties were studied in details. The results show that these compounds possess strong excited-state absorption (ESA) properties and optical limiting with nanosecond laser pulses at 532 nm. Moreover, they also preserve the luminescence originated from naphthalimide and two-photon absorption (TPA) behaviour which can be observed under femtosecond laser pulses ranged from 750 to 870 nm. The broad-band optcial limiting properties of these compounds indicate that they can be potentially applicated in optical limiting materials.
Polymer-immobilized catalyst for asymmetric hydrogenation of racemic α-(N-benzoyl-N-methylamino)propiophenone
Chiwara, Vinia Ipai,Haraguchi, Naoki,Itsuno, Shinichi
supporting information; experimental part, p. 1391 - 1393 (2009/07/04)
Asymmetric hydrogenation of α-(N-benzoyl-N-methylami-no)propiophenone through dynamic kinetic resolution was performed by using a polymer-immobilized chiral diamine-ruthenium-BINAP-t-BuOK system in order to yield syn-β-amidealcoholexclusivelywithnearlyperfectenantioselectivity.
Polymeric nitrons. 2. Synthesis, irradiation and waveguide mode spectroscopy of polymeric nitrons derived from polymeric benzaldehydes and N-isopropylhydroxylamine
Heinenberg, Michael,Menges, Bernhard,Mittler, Silvia,Ritter, Helmut
, p. 3448 - 3455 (2007/10/03)
Various vinylbenzaldehydes were prepared using the Heck reaction: 4-vinylbenzaldehyde (14), 3-vinylbenzaldehyde (15), 2-vinylbenzaldehyde (18a), 2-hydroxy-4-vinylbenzaldehyde (16) and 4-[(4-vinylbenzyl)oxy]benzaldehyde (6). The four monomers (6, 14, 15, 16) were polymerized using AIBN as initiator at 70 °C for 24 h to yield the corresponding homopolymers (7, 19, 23, 25) and a copolymer (20) with styrene. The molecular weights are about 10 000. The polymer analogous condensation of the aldehyde groups with an excess of N-isopropylhydroxylamine (8) at room temperature produces polymeric nitrons (9, 21, 22, 24, 26) in almost quantitative yields. All nitron functions were irradiated, and the intramolecular cyclization of the nitrons to the corresponding oxaziridines was examined. Waveguide mode spectroscopy of poly(4-vinylbenzaldehyde-N-isopropylnitron) (21) shows that the changes in film thickness are low but the changes in refractive indices are significant after irradiation. Oxaziridine 10 has high thermal stability with respect to ring opening. No structural change was detected after irradiation of the hydrexyphenyl-modified polynitron (26). A low molecular weight model compound (2-hydroxybenzaldehyde-N-methylnitron, 28) was prepared id order to examine this abnormal photochemical behavior and also showed that it is highly resistant to UV irradiation.
Use of heterogenized dialdimine ligands in asymmetric transfer hydrogenation
Breysse, Emmanuelle,Pinel, Catherine,Lemaire, Marc
, p. 897 - 900 (2007/10/03)
Heterogenized dialdimine ligands complexed to iridium were tested in the asymmetric transfer hydrogenation of acetophenone. E.e.s of up to 70% were achieved but the recycling was unsatisfactory. When such ligands were used in asymmetric epoxidation of styrene, a modest e.e. of 15% was achieved.
