66955-51-9Relevant academic research and scientific papers
Development of a superhydrophobic polybenzoxazine surface with self-cleaning and reversible water adhesion properties
Zhang, Wenfei,Lu, Xin,Xin, Zhong,Zhou, Changlu
, p. 106054 - 106063 (2016)
A superhydrophobic polybenzoxazine surface has been developed by utilizing pendent aliphatic chain-substituted benzoxazine and TiO2. Surface wettabilities, and static and dynamic wettability, have been characterized by contact angle measurement. As a result, the prepared superhydrophobic polybenzoxazine/TiO2 film exhibits a static water contact angle of ～163 ± 3° with a low water sliding angle of ～1°, leading to self-cleaning properties. This superhydrophobic polybenzoxazine/TiO2 surface also has excellent resistance to solvents and corrosive liquids. Interestingly, this low-adhesive superhydrophobic surface switches to a high-adhesive surface when exposed to UV light and transfers to the initial low adhesion surface when heated. The mechanism of the smart switch has been studied by using FT-IR, XPS and AFM. TiO2 is responsible for the reversible water adhesion as it can absorb and desorb water molecules after UV irradiation and heat treatment. More importantly, along with the pendent aliphatic chains of polybenzoxazine, the surface maintains stable superhydrophobicity during the reversible switch.
Aryl Derivatives And Uses Thereof
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Paragraph 0172, (2014/05/20)
The present invention relates to antimalarial compounds and their use against protozoa of the genus Plasmodium, including drug-resistant Plasmodia strains. This invention further relates to compositions containing such compounds and a process for making the compounds.
Isoquinolones
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, (2008/06/13)
Benzo[de]isoquinoline-1,3-dione of Formula or a pharmaceutically acceptable salt thereof wherein R is hydrogen or a protecting group typically used in the art for protecting alcohols and R1-R5are each independently chosen from H, Cl, Br, F, straight or branched alkyl C1-C8alkyl, C3-C8cycloalkyl, heterocycle or bridged heterocycle of 4-9 atoms containing 1-3 heteroatoms, —(CR′2)nOR6, —(CR′2)nN(R6)2, —(CR′2)nNR6COR7, —(CR′2)nNR6SO2OR7, —(CR′2)nNR6SO2N(R6)2, —(CR′2)nOSO2N(R6)2, —(CR′2)nCN, —(CR′2)n(NOR6)R7, NO2, CF3, —(CR′2)nSOmR7, —(CR′2)nSOmR7, —(CR′2)nCO2R6, —(CR′2)nCON(R6)2, Ph, and any two of R1-R5may form a substituted or unsubstituted ring of 5-7 total atoms having 0-2 heteroatoms are claimed which are selective inhibitors of bacterial DNA gyrase and DNA topoisomerase useful in antibacterial agents. Methods for their preparation and formulation as well as novel intermediates useful in the preparation of the final products are also claimed.
Chromium complexes of hydroxyl-functionalised 1,3,5-triazacyclohexanes
Baker, Murray V.,Brown, David H.,Skelton, Brian W.,White, Allan H.
, p. 1483 - 1490 (2007/10/03)
The chromium co-ordination chemistry of three 1,3,5-triazacyclohexanes bearing hydroxyl-functionalised substituents on nitrogen has been explored. The complexes [CrL3(C3H6N3R3)] (L = CO, R = CH2CH2OH, CH2CH2CH2OH or o-hydroxybenzyl; L = Br, R = CH2CH2CH2OH) have been prepared. Characterisation of the carbonyl complexes by spectroscopic and structural methods indicated that the triazacyclohexanes co-ordinate to the chromium centre through the three nitrogen atoms only. Crystal structure determinations for 1,3,5-tri(o-hydroxybenzyl)-1,3,5-triazacyclohexane and [Cr(CO)3(C3H6N3R3)] (R = CH2CH2OH or CH2CH2CH2OH) have been made.
Studies on the Benzoxazine Series. Part 1. Preparation and 1H and 13C Nuclear Magnetic Resonance Structural Study of Some Substituted 3,4-Dihydro-2H-1,3-benzoxazines
Neuvonen, Kari,Pihlaja, Kalevi
, p. 461 - 468 (2007/10/02)
In addition to the parent compounds nine methyl-substituted 3,4-dihydro-2H-1,3-benzoxazines with and without N-methyl substitution were prepared.The former contain usually but minor amounts of the open-chain tautomer, too.The conformations and configurations of the oxazine rings were solved on the basis of 1H and 13C n.m.r. data which were best explained by assuming the N-methyl group predominantly axial in 3,4-dihydro-3-methyl-2H-1,3-benzoxazines.The oxazine ring prefers a half-chair form where the 4ax'- and 4eq'-methyl groups are practically equally stable.Hence, 3,4-dihydro-4-methyl-2H-benzoxazine is a 54:46 and the corresponding 3-methyl derivative an 8:92 mixture of the 4eq' and 4ax' forms.The 2,2,3,4-tetramethyl derivative is not conformationally homogeneous either.Substituent effects on 13C n.m.r. chemical shifts were found to be especially useful in configurational and conformational analysis and gave an excellent fit between observed and calculated shift values.
