2351-36-2Relevant academic research and scientific papers
Metallogels and Silver Nanoparticles Generated from a Series of Transition Metal-Based Coordination Polymers Derived from a New Bis-pyridyl-bis-amide Ligand and Various Carboxylates
Nath, Karabi,Husain, Ahmad,Dastidar, Parthasarathi
, p. 4635 - 4645 (2015)
A new series of coordination polymers, namely, CP2 [{(H2O)Co1.5(μ-3-bpna)1.5(μ-btc)}·3DMF·3H2O]α, CP3 [{Cd(μ-3-bpna)(μ-hbtc)}·CH3OH·2H2O]α, CP4 [{Co(μ-3-bpna)(μ-ipa)}·DMF·2H2O]α, CP5 [{Co(μ-3-bpna)(μ-1,3-pda)}·DMF]α, CP6 [Cd(μ-3-bpna)0.5(μ-1,3-pda)]α, CP7 [(H2O)Co0.5(μ-3-bpna)0.5(μ-1,4-pda)0.5]α, and CP8 [{Zn(μ-3-bpna)(μ-oba)}·DMF·2H2O]α, has been synthesized by reacting a hydrogen-bond-functionalized bis-pyridyl ligand, namely, N′,N″-di(pyridin-3-yl)naphthalene-2,6-dicarboxamide, with various transition metal salts and different di- or tricarboxylates (as co-ligand) displaying 2D and 3D network topology and having lattice-occluded solvents in the majority of cases. A 1D coordination polymer, namely, CP1 [{Ag0.5(μ-3-bpna)}0.5·0.5BF4·CH3CN]α, has also been isolated by reacting 3-bpna with AgBF4 in the absence of any carboxylate co-ligand. All of the CPs were characterized by single crystal X-ray diffraction. Interestingly, two such CPs, namely, CP1 and CP2, produced metallogels, which were characterized by rheology, transmission electron microscopy, and X-ray powder diffraction. The metallogel of CP1 produced Ag nanoparticles within the gel bed upon exposure to light. (Chemical Equation Presented).
Electronic Coupling between Two Covalently Bonded Dimolybdenum Units Bridged by a Naphthalene Group
Zhu, Guang Yuan,Meng, Miao,Tan, Ying Ning,Xiao, Xuan,Liu, Chun Y.
, p. 6315 - 6322 (2016)
Using 2,6-naphthalenedicarboxylate and its thiolated derivatives as bridging ligands, three Mo2 dimers of the type [Mo2(DAniF)3](E2CC10H6CE2)[Mo2(DAniF)3] (DAniF = N,N′-di-p-anisylformamidinate; E = O, S) have been synthesized and characterized by X-ray diffraction. These compounds can be generally formulated as [Mo2]-naph-[Mo2], where the complex unit [Mo2] ([Mo2(DAniF)3(μ-E2C)]) functions as an electron donor (acceptor) and the naphthalene (naph) group is the bridge. The mixed-valence (MV) complexes, generated by one-electron oxidation of the neutral precursors, display weak, very broad intervalence charge-transfer absorption bands in the near-to-mid-IR regions. The electronic coupling matrix elements for the MV complexes, Hab = 390-570 cm-1, are calculated from the Mulliken-Hush equation, which fall between those for the phenyl (ph) and biphenyl (biph) analogues reported previously. The three series consisting of three complexes with the same [Mo2] units exhibit exponential decay of Hab as the bridge changes from ph to biph via naph, with decay factors of 0.21-0.17 ?-1. Therefore, it is evidenced that while the extent of the bridge conjugacy varies, the electronic coupling between the two [Mo2] units is dominated by the Mo2···Mo2 separation. The absorption band energies for metal-to-ligand charge transfer are in the middle of those for the ph and biph analogues, which is consistent with variation of the HOMO-LUMO energy gaps for the complex series. These results indicate that the interplay of the bridge length and conjugacy is to affect the enegy for charge transfer crossing the intervening moiety, in accordance with a superechange mechanism.
With high planarity of the naphthalene structure function diamine monomer and its synthetic method and application
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Paragraph 0040; 0041; 0042, (2017/08/25)
The invention discloses functional diamine monomers having high planarity and containing a naphthaline structure and a synthesis method and application thereof. The novel functional diamine monomers are prepared from raw materials monomers such as dihalogenated naphthaline, naphthalic acid, naphthalenediol or naphthylenediamine through a series of chemical reactions such as substitution reaction, Suzuki reaction, amidation reaction, esterification reaction, Grignard reaction, Kumada coupling reaction. The diamine monomers containing a naphthaline structure, which have a lowest energy state 3D molecular structure and have high planarity, can be obtained. Due to planar space structure, the diamine monomers disclosed by the invention can serve as monomers used for preparing polymers with strong molecular chain interaction force, tight molecular chain packing and small free volume and the polymers can be endowed with an excellent barrier property. The synthesis method of the diamine monomers is simple in process and purification operation is easy; therefore, the synthesis method is suitable for industrial production. The diamine monomers disclosed by the invention can be used for synthesizing functional polymers such as polyamide, polyimide, polyamide-imide and polyester-imide.
Self-assembled Pd6L4 cage and Pd4L4 square using hydrazide based ligands: Synthesis, characterization and catalytic activity in Suzuki-Miyaura coupling reactions
Pradhan, Subhashis,John, Rohith P.
, p. 12453 - 12460 (2016/02/12)
A discrete Pd6L4Td-symmetric molecular cage and a discrete Pd4L4 square assembly were obtained using a coordination-driven self-assembly technique. The assembly, Pd6L4, was prepared via a face-directed method, utilising a 'cis-clipped' palladium(ii) species and a new C3 symmetric tripodal hydrazinic ligand. The Pd4L4 square assembly was prepared via an edge directed method, using the 'cis-clipped'-palladium(ii) species and a new C2 symmetric dipodal hydrazinic ligand. Both assemblies were characterised using multinuclear NMR and ESI-MS spectroscopic techniques and elemental analysis. The size of the assemblies were assigned from HR-TEM measurements, while DOSY NMR analysis established the presence of single component species in solution. Optimised structures obtained using Hartree-Fock calculations are in conformity with the experimental results. Both the assemblies show significant catalytic activity as heterogeneous catalysts for Suzuki-Miyaura coupling reactions under mild, aerobic and phosphine free conditions in aqueous ethanolic medium.
Method of manufacturing imidoyl diazidosulfochloride compd. various compd. and manufacturing method of using the same
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Paragraph 0059, (2016/12/16)
PROBLEM TO BE SOLVED: To provide a new production method for synthesizing an imidoyl chloride compound dispensing with chlorination agents having poor handleability, to provide a method for producing various compounds in high yield and purity by using the imidoyl chloride compound, and to provide a method for isolating the imidoyl chloride compound in high efficiency and purity from a mixture of the imidoyl chloride compound and a phthalic anhydride compound.SOLUTION: The method for producing the imidoyl chloride compound comprises reaction of a specific amide compound with a specific phthaloyl chloride compound to produce a specific imidoyl chloride compound.
New preparation method for Vilsmeier reagent and related imidoyl chlorides
Kimura, Yoshikazu,Matsuura, Daisuke,Hanawa, Takeshi,Kobayashi, Yukimoto
experimental part, p. 1116 - 1118 (2012/03/26)
An environmentally benign and inexpensive preparation method is described of some imidoyl chlorides, including the Vilsmeier reagent (VR), by using phthaloyl dichloride. Synthetic applications were demonstrated using the isolated VR or VR prepared in situ for the transformation of acids to acid chlorides, alcohols to chlorides, and the formylation of dimethylaminobenzene.
Enantioselective annulation reactions of bisenolates prepared through dearomatization reactions of aromatic and heteroaromatic diesters
Perez-Vazquez, Jaime,Veiga, Alberte X.,Prado, Gustavo,Sardina, F. Javier,Paleo, M. Rita
supporting information; experimental part, p. 975 - 987 (2012/04/04)
A one-pot, enantioselective strategy for the dearomatization-annulation of aromatic diesters to give a range of highly functionalized polycyclic molecules with excellent enantioselectivity is presented. This methodology is based on the reaction of bisenolates, prepared by treating aromatic diesters with trialkyltin lithium reagents, which involves a stanna-Brook rearrangement, with 1,ω-dihaloalkanes and other biselectrophiles. We have also developed experimental conditions for performing these reactions with substoichiometric amounts of the required tin reagent by in situ recycling of Me 6Sn2 into Me3SnLi with excess lithium metal, and provide a study of the scope and limitations of this synthetic methodology. The alkylation of chiral bisenolates opens a straightforward one-pot access to highly functionalized bicyclic compounds from aromatic diesters. A stanna-Brook rearrangement originates the key bisenolate intermediate. Copyright
A palladium-catalyzed multicomponent coupling approach to π-conjugated oligomers: Assembling imidazole-based materials from imines and acyl chlorides
Siamaki, Ali R.,Sakalauskas, Marc,Arndtsen, Bruce A.
supporting information; experimental part, p. 6552 - 6556 (2011/09/13)
Just like tinkertoys: An alternative approach to access imidazole-containing π-conjugated materials is presented. The imidazole core was assembled at the same time as the oligomer by the palladium-catalyzed multicomponent coupling of imines, diimines, and di(acyl chloride)s, thus providing access to families of new conjugated materials, each formed in a one-step, catalytic reaction (see scheme; Ts=4-toluenesulfonyl). Copyright
NOVEL INHIBITORS OF HEPATITIS C VIRUS REPLICATION
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Page/Page column 259-260, (2011/07/06)
The embodiments provide compounds of the general Formulae I, II, III, IV, or V as well as compositions, including pharmaceutical compositions, comprising a subject compound. The embodiments further provide treatment methods, including methods of treating a hepatitis C virus infection and methods of treating liver fibrosis, the methods generally involving administering to an individual in need thereof an effective amount of a subject compound or composition.
Self-assembly of porphyrin-azulene-porphyrin and porphyrin-azulene conjugates
Xiao, Ze-Yun,Zhao, Xin,Jiang, Xi-Kui,Li, Zhan-Ting
experimental part, p. 2540 - 2547 (2009/10/31)
In this paper we report the synthesis and self-assembling behavior of new porphyrin-azulene-porphyrin and porphyrin-azulene conjugates. The porphyrin-azulene-porphyrin conjugate gelates a number of organic solvents, while the porphyrin-azulene conjugates form vesicles in a chloroform-methanol binary mixture. The structures of the organogels and vesicles have been characterized by SEM and AFM. Two porphyrin-naphthalene-porphyrin and porphyrin-naphthalene conjugates were also prepared. A comparison of their properties with those of the azulene analogues reveals that the intermolecular dipole-dipole interaction of the azulene units plays an important role in promoting the self-assembly of the porphyrin-azulene-porphyrin and porphyrin-azulene conjugates. The Royal Society of Chemistry 2009.
