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Norbornadiene
About: Norbornadiene is a research topic. Over the lifetime, 2389 publications have been published within this topic receiving 38603 citations.
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TL;DR: In this article, the influence of norbornadiene and its derivatives on the photoluminescence (PL) of quantum-confined cadmium sulfide clusters (Q-CdS) prepared in reverse micelles was investigated.
Abstract: Influence of norbornadiene and its derivatives on the photoluminescence (PL) of quantum-confined cadmium sulfide clusters (Q-CdS) prepared in reverse micelles wm investigated. It was found that norbornadiene-2,3-dicarboxylic acid (3) and its monopotassium salt (4) quenched PL intensity by 77% and 62%, respectively, whereas its dipotassium salt (a), norbornadiene (1) and norbornadiene-2,3-dimethylcarboxylate (2) had no effect on PL intensity. The formation constants for adducts formed between defect sites at the surface of Q-CdS clusters and 3 or 4 were also determined. PL quenching effect was attributed to the presence of ionizable proton which is considered to be able to trap photogenerated electrons and remove them from possible decay process. Measurements of the PL decay by single photon counting technique also supported these steady-state observations.
01 Jan 2012
TL;DR: In this paper, the reactions of the bimetallic compound Na(W2(µ-Cl)3Cl4(THF)2)·THF3 (1, (W 3 W) 6+, a' 2 e' 4 ) with norbornene and some of its derivatives (5-X-2-NBE; X = COOH (NBE-COOH), O = COHOH, O = CN, CN, COOMe, NBE-CN), CH = CH2 (VNBE),
Abstract: In this study, the reactions of the bimetallic compound Na(W2(µ-Cl)3Cl4(THF)2)·(THF)3 (1, (W 3 W) 6+ , a' 2 e' 4 ) with norbornene (NBE) and some of its derivatives (5-X-2-NBE; X = COOH (NBE-COOH), OH (NBE-OH), CN (NBE-CN), COOMe (NBE-COOMe), CH=CH2 (VNBE); norbornadiene (NBD)) are described. Complex 1 contains a tungsten-tungsten triple bond, bearing three halide bridges and two labile THF ligands, in a cisoidal relationship along the metal-metal axis. The complex was found to be a highly efficient room temperature homogeneous and heterogeneous unicomponent initiator for the catalytic ring opening metathesis polymerization (ROMP) of most substrates. NBE provides polynorbornene (PNBE) of high molecular weight (Mw) in high yields, soluble in organic solvents. The reaction proceeds with high cis-stereoselectivity (80%-86% cis), independently of the reaction conditions. Strongly coordinating pendant groups (-COOH, -OH, -CN) deactivate 1, whereas substrates bearing softer ones (-COOMe, -CH=CH2) are quantitatively polymerized. NBD gives
01 Sep 1972
TL;DR: In this paper, Bisdiazoterephthalaldehyde, para-bisdiazobenzoylbenzene and meta-bis-diazobenzene were synthesized as dicarbene precursors.
Abstract: : Bisdiazoterephthalaldehyde, para-bisdiazobenzoylbenzene and meta-bis-diazobenzoylbenzene were synthesized as dicarbene precursors. Simultaneous dicarbene formation and olefinic insertion was attempted. However, what was observed was 1,3-dipolar addition of the bisdiazo compounds and strained olefinic systems such as norbornene and norbornadiene. Nuclear magnetic resonance spectroscopy indicates that the stereo-chemistry of the adducts formed lead to some large chemical shifts. Polymerization was also attempted between meta-bisdiazobenzoylbenzene and norbornadiene.
Patent•
03 Mar 1983TL;DR: Bicycle and tricyclic oxa prostaglandin endoperoxide analogs are derived by reacting norbornadiene palladium dichloride with tertiary butyl-6-hydroxyhexanoate in an oxypalladation reaction as discussed by the authors.
Abstract: Bicyclic oxa prostaglandin endoperoxide analogs, and tricyclic oxa prostaglandin analogs are prepared by reacting norbornadiene palladium dichloride with tertiary butyl-6-hydroxyhexanoate in an oxypalladation reaction to provide an oxypalladium intermediate which can subsequently be elaborated into bicyclic and/or tricyclic 7-oxa prostaglandin endoperoxides. If the intermediate is carbonylated in the presence of an organic amine, preferably diisopropylethylamine, the compound is bicyclic; if the amine is eliminated, the compound is tricyclic. The analogs are novel compounds.
Patent•
21 Oct 2019
TL;DR: In this article, a method of producing a norbornadiene fullerene derivative of formula 1:, which can be used as a complexing agent, a sorbent, a biologically active compound.
Abstract: FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing a norbornadiene fullerene derivative of formula 1:,which can be used as a complexing agent, a sorbent, a biologically active compound. Method consists in the fact that C-fullerene reacts with norbornadiene ether of chloroacetic acidin dry toluene in the presence of t-BuOK, taken in molar ratio C:ether:t-BuOK = 1:(1–2):(2–4), at temperature of 20 °C for 5–15 minutes.EFFECT: disclosed method enables to obtain an end product with output of 10–52 %.1 cl, 1 tbl, 7 ex