19806-14-5Relevant articles and documents
Hydrophilic microporous lanthanide-organic frameworks based on 4,4′-biphenyldiacetate: Synthesis, crystal structures and sorption properties
Makhloufi, Gamall,Francis, Biju,Dechnik, Janina,Strzelczyk, Alexander,Janiak, Christoph
, p. 59 - 67 (2017)
Fifteen microporous coordination polymers of symmetrical and flexible 4,4′-biphenyldiacetate (bpda2–) with lanthanide(III) cations (Ln3+) of formula {[Ln2(bpda)3(H2O)]?2H2O}n(Ln?=?La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), Tb (8), Dy (9), Ho (10), Er (11), Tm (12), Yb (13), Lu (14), Y (15)), have been synthesized and characterized. Single crystal X-ray diffraction (for 1, 3 and 4) in combination with powder X-ray diffraction showed isostructural compounds with an infinite secondary building unit (SBU). In this SBU, two crystallographically independent lanthanide ions are connected by three carboxylate groups in chelating-bridging mode to zig-zag Ln-carboxylate chains. These chains are assembled by the biphenyl part of the ligand to a 3D network with water molecules in channels with rectangular cross-sections of ~1.6?×?3??2. Thermogravimetric analysis indicates complete removal of the water molecules at 150?°C and thermal stability up to 380?°C. Stability studies on compound 1 show no degeneration in crystallinity after refluxing in water or different organic solvents. The dehydrated compound 1 exhibited no N2or H2uptake at 77?K and no CH4or CO2uptake at 273?K up to 1?bar. High-pressure (17?bar, 273?K) CO2uptake of dehydrated [Ln2(bpda)3]ncorresponded to the formation of {[Ln2(bpda)3]·CO2}nwith about 40% of the adsorbed CO2retained upon desorption. Water vapor sorption of activated and hygroscopic [Ln2(bpda)3]nreformed {[Ln2(bpda)3(H2O)]·2H2O}n. 4,4′-Biphenyldiacetic acid (H2bpda) shows blue emission, its europium 6 and terbium 8 compounds show red and weak green luminescence under UV light irradiation, with the bpda2?ligand acting as an antenna ligand for the europium(III) ions.
Non-planar oligoarylene macrocycles from biphenyl
Robert, Antoine,Dechambenoit, Pierre,Hillard, Elisabeth A.,Bock, Harald,Durola, Fabien
, p. 11540 - 11543 (2017)
Saddle- and propeller-shaped macrocycles are obtained by fourfold Perkin condensations in transient high dilution of 4,4′-bis(phenylglyoxylic acid) with either 4,4′-bis(phenylacetic acid) or p-phenylenediacetic acid, followed by four-fold oxidative photoc
An efficiently cobalt-catalyzed carbonylative approach to phenylacetic acid derivatives
She, Meng-Yao,Xiao, Da-Wei,Yin, Bing,Yang, Zheng,Liu, Ping,Li, Jian-Li,Shi, Zhen
, p. 7264 - 7268 (2013/08/23)
A highly efficient cobalt-catalyzed carbonylative approach to phenylacetic acid derivatives under one atmosphere pressure is reported. This methodology represents a useful extension of benzimidazole used as ligand in metal catalysis, and the catalytic mechanism has been proved by computer simulation. Notably, this new cobalt precatalyst, which promotes the carbonylation reaction dramatically and has already been used for scale-up experiment of phenylacetic acid derivatives.