13799-90-1Relevant academic research and scientific papers
Flexibility in metal-organic frameworks derived from positional and electronic effects of functional groups
Ha, Hyeonbin,Hahm, Hyungwoo,Jwa, Dong Gyun,Yoo, Kwangho,Park, Myung Hwan,Yoon, Minyoung,Kim, Youngjo,Kim, Min
, p. 5361 - 5368 (2017/09/26)
The position of identical functional groups and the subsequent electron density of structural benzene rings in a zinc-based metal-organic framework (MOF) have been controlled to reveal flexibility (or breathing behavior) differences. Both ortho- and para-positioned bi-functional benzene-1,4-dicarboxylic acid (BDC) ligands were synthesized with amino-, chloro-, methoxy-, and nitro groups. Additionally, two tri-functionalized, dimethoxy-amino and dimethoxy-nitro BDCs were prepared. All bi- and tri-functionalized BDCs were successfully incorporated into DABCO MOFs (DMOFs), except two diamino BDCs which were insoluble and thermally unstable. Among the eight bi-/tri-functionalized DMOFs, only para-dimethoxy exhibited flexibility in its framework after evacuation in preparation for N2 isotherm measurement. Since the dimethoxy combination has the most electron-rich environment in the benzene ring of the BDC in this series, this indicates that electron density plays a role in the flexibility changes of identically bi-functionalized DMOFs. However, the electron density alone could not fully explain the flexibility changes suggesting that the position of the functional groups is also important. These findings have been corroborated through the synthesis of two tri-functionalized DMOFs with identical functional group locations but opposite electronic environments.
Quinacridone nanoscale pigment particles
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Page/Page column 21-22, (2008/12/07)
A nanoscale pigment particle composition includes a quinacridone pigment including at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, wherein the functional moiety associates non-covalently with the functional group; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized particles.
PROCESS FOR THE SYNTHESIS OF HALOGENATED AROMATIC DIACIDS
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Page/Page column 17, (2008/12/07)
The production of high-purity halogenated aromatic diacids from halogenated dimethylbenzene by oxidation with an oxygen-containing gas is conducted using a four-component catalyst system and a two-stage temperature process.
Synthesis of novel polycyclic ring systems containing two pyrano[2,3-c]pyrazol-4-(1H)one moieties
Eller,Wimmer,Holzer
, p. 1060 - 1064 (2008/09/18)
Novel penta-or heptacyclic ring systems containing two pyrano[2,3-c] pyrazol-4(1H)-one units are prepared in one or two steps from the reaction of 3-methyl-1-phenyl-2-pyrazolin-5-one and bis(o-chlorocarbonyl chlorides) derived from benzene-or 1,10-phenanthroline.
Electrocarboxylation of chlorinated aromatic compounds
Golinske, Dirk,Voss, Juergen,Adiwidjaja, Gunadi
, p. 862 - 880 (2007/10/03)
Chorinated benzenes (1, 4), biphenyls (6, 9), dibenzofurans (10, 15, 17, 18), 2-chlorodibenzo[1,4]dioxine (24) and 1-chloronaphthalene (26) as well as dibenzofuran (12) and naphthalene (27) themselves were transformed into carboxylic acids by galvanostatic electroreduction in the presence of carbon dioxide ("electrocarboxylation"). Dry DMF was used as solvent, zinc or stainless steel as cathode and magnesium as a sacrificial anode in an undivided cell. Hydrogenation of aromatic rings was not observed. However, reductive addition of two molecules of carbon dioxide to form dihydrodicarboxylic acids, e.g. 22 and 29, occurs in the dibenzofuran and naphthalene series.
The Synthesis of some Benzodiisothiazoles
McKinnon, David M.,Abouzeid, Azza A.
, p. 445 - 448 (2007/10/02)
Four examples of benzodiisothiazoles have been made by cyclisation of appropriate o-alkylthioarylketoximes by simultaneous or consecutive ring formation.
