18653-75-3Relevant articles and documents
Synthesis, crystal structure, Hirshfeld surface analysis, electronic structure through DFT study and fluorescence properties of a new anthracene based organic tecton
Pal, Nilasish,Singha, Debabrata,Jana, Atish Dipankar
, p. 102 - 111 (2017)
A new organic molecule 9,10-bis((2-(pyridin-2-yl)-1H-imidazol-1-yl)methyl)anthracene (APIM) has been synthesized. Crystal structure analysis of the molecular solid reveals that CH?π and π?π interactions are the molecular packing forces in the solid state. Thermal analysis of the molecular solid shows relatively higher decomposition temperature of the crystalline molecular solid that correlates well with the cooperative nature of CH?π and π?π interactions. Density Functional Theory (DFT) optimized structure of the molecule closely correlates with that found in the crystal. DFT optimizations also lead to the similar CH?π and π?π interaction motifs that are found within the crystal. Hirshfeld surface analysis provides detailed insight into the relative importance of various weak forces in the molecular packing. Study of the fluorescence behavior of the molecules shows quenching in the presence of metal ions.
Control of redox potential by deprotonation of coordinated 1H-imidazole in complexes of 2-(1H-imidazol-2-yl)pyridine
Stupka, Gilles,Gremaud, Ludovic,Williams, Alan F.
, p. 487 - 495 (2005)
Complexes [ML3]2+ of the bidentate ligand 2-(1H-imidazol-2-yl)pyridine were prepared with iron(II), cobalt(II), and ruthenium(II). The electronic spectra suggest the ligand to be a weaker σ-donor and π-acceptor than the closely related 2,2′-bipyridine. The complexes are readily deprotonated by addition of base, and the effect of the deprotonation is to lower the MIII/MII redox potential by roughly 900 mV. This is roughly 75% of the drop observed for related complexes of 2,6-di-1H-imidazol-2-ylpyridine, and suggests the effect to be largely coulombic in origin.
Magnetic and liquid crystalline property of long-alkyl chain appended iron (II) imidazole complexes
Karim, Mohammad Razaul,Takehira, Hiroshi,Rahman, Mohammed M.,Asiri, Abdullah M.,Amin,Ohtani, Ryo,Hayami, Shinya
, p. 42 - 47 (2016)
Fe[((py)im-C16)3](BF4)2 (1) and Fe[((py)imH)3](BF4)2 (2), the Iron(II) compounds with C16 long alkyl chain appended (py)imH and unmodified (py)imH [(py)imH = 2-(2-pyridyl)imidazole] have be
Modulation of photophysical properties of copper(I) complexes containing pyridyl-imidazole (PyIm) ligands functionalized by naphthyl, phenanthryl, and anthryl groups
Wang, Jinglan,Chai, Chaoyang,Xu, Shengxian,Zhao, Feng,Xia, Hongying,Wang, Yibo
, p. 237 - 244 (2019)
A series of Cu(I) pyridyl-imidazole (PyIm) complexes with different aryl groups (Ar = naphthalene (P2), phenanthrene (P3), and anthracene (P4)) attached on the pyridyl ring are synthesized and characterized. The influence of these organic chromophore groups on the photophysical properties of the resulting complexes is investigated. Complexes P2–P4 show stronger light harvesting efficiencies in the visible region compared with the parent complex P1. The emitting state of complex P1 originates from the 3MLCT state with some 3LLCT character, while complexes P2 and P3 predominantly exhibit the 3LLCT character. For complex P4, the triplet emitting state is dominated by the 3(π → π) state localized on the anthryl moiety, together with a lesser contribution form the 3LLCT state. These changes in the photophysical properties were rationalized by DFT and TDDFT methods.
Synthesis and characterization of novel fluorescent BOPIM dyes with large Stokes shift
Mao, Miaofu,Xiao, Shuzhang,Yi, Tao,Zou, Kun
, p. 612 - 616 (2011)
A novel BOPIM (boron 2-(2-pyridyl)imidazole complex) dye 1 was facilely synthesized by treatment of previously reported 2-(2′-pyridyl)imidazole with BF3·Et2O under basic condition. The bromination of BOPIM dye 1 by NBS gives an unexpected product 2-(2′-pyridyl)-4,5-dibromoimidazole (L2) with no BF2 group. The desired brominated boron complex 2 was obtained by treating L2 with BF 3·Et2O. The photophysical properties of these two compounds are thoroughly studied in various solvents. Compound 1 formed aggregates in non-polar solvents, inducing abnormal emission in long-wavelength region. Both 1 and 2 show moderate fluorescent intensity and comparatively large Stokes shift, especially for compound 2 (fluorescent quantum yield is more than 0.30, and Stokes shift is over 70 nm in all adopted solvents) due to its p, π-conjugated effect, which makes BOPIM a valuable building block for synthesis of multi-functional materials.
Hydrogen production from formic acid catalyzed by a phosphine free manganese complex: Investigation and mechanistic insights
Léval, Alexander,Agapova, Anastasiya,Steinlechner, Christoph,Alberico, Elisabetta,Junge, Henrik,Beller, Matthias
, p. 913 - 920 (2020)
Formic acid dehydrogenation (FAD) is considered as a promising process in the context of hydrogen storage. Its low toxicity, availability and convenient handling make FA attractive as a potential hydrogen carrier. To date, most promising catalysts have been based on noble metals, such as ruthenium and iridium. Efficient non-noble metal systems like iron were designed but manganese remains relatively unexplored for this transformation. In this work, we present a panel of phosphine free manganese catalysts which showed activity and stability in formic acid dehydrogenation. The most promising results were obtained with Mn(pyridine-imidazoline)(CO)3Br yielding >14 l of the H2/CO2 mixture and proved to be stable for more than 3 days. Additionally, this study provides insights into the mechanism of formic acid dehydrogenation. Kinetic experiments, Kinetic Isotopic Effect (KIE), in situ observations, NMR labeling experiments and pH monitoring allow us to propose a catalytic cycle for this transformation.
Gravimetric, electrochemical and surface studies on the anticorrosive properties of 1-(2-pyridyl)-2-thiourea and 2-(imidazol-2-yl)-pyridine for mild steel in hydrochloric acid
Zhang, Weiwei,Li, Hui-Jing,Wang, Yiwei,Liu, Ying,Gu, Qing-Ze,Wu, Yan-Chao
, p. 12649 - 12665 (2018/08/01)
1-(2-Pyridyl)-2-thiourea (TP) and 2-(imidazol-2-yl)-pyridine (IP) are described here for the first time as inhibitors of mild steel corrosion in acidic medium based on investigations such as weight loss tests, potentiodynamic polarization measurements and
