An Efficient Gadolinium Metallocene-Based Catalyst for the Synthesis of Isoprene Rubber with Perfect 1,4-Cis Microstructure and Marked Reactivity Difference between Lanthanide Metallocenes toward Dienes As Probed by Butadiene−Isoprene Copolymerization Catalysis

Highly stereospecific polymerization of isoprene with homogeneous binary Ziegler-Natta catalysts based on NCN-pincer neodymium precursor

“…The molecular weight of the resultant polyisoprene was found to increase almost linearly and reached 158.2 × 10 4 g/mol at a ratio of 8000. Meanwhile, the molecular weight distribution became even narrower (PDI = 1.68, Figure 3) (Table 3, entries [13][14][15][16][17][18][19]. The result suggested that this system was probably a single site to induce controllable polymerization.…”

“…Recently, the well-defined LnC bond containing such complexes as lanthanide-based metallocene alkyl complexes [15,16] and lanthanide alkyls bearing the non-cyclopentadienyl auxiliary ligand [17][18][19] was developed. With these systems, more controllable polymerization with high selectivity could be achieved.…”

A rheological study on non-rubber component networks in natural rubber

“…And the natural rubber (NR) latex, collected from the Hevea trees as a colloidal suspension [1], is the main commercial feedstock for rubber and latex dipping industries. Under this circumstance, synthetic analogue polyisoprene with high expectations to replace natural rubber is modified mainly by various molecule design [8][9][10][11][12][13], while the comprehensive properties were disappointing. [2,3] Nowadays, natural rubber has become increasingly important for applications spanning many fields of chemistry, the hygienic and medical sectors, and it is further involved in a broad spectrum of consumer products in our daily life [4][5][6][7].…”

Hydrothermal Synthesis, Structure, Properties of a Novel Supramolecular Complex: [LaCd(bpy)4(NO3)5]

“…These elements show typical electronic properties that potentially give great advantages to the complexes they form with organic ligands. In the trivalent state, they are hard Lewis acids that have interesting applications in catalysis in the fields of polymer synthesis [1][2][3][4][5], organic chemistry [6][7][8][9][10][11][12][13], and bioinorganic chemistry [14][15][16][17][18][19][20].…”

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A novel lanthanum cadmium complex [LaCd(bpy) 4 (NO 3 ) 5 ] (where bpy = 2,2 -Bipyridine) has been synthesized and structurally characterized by X-ray diffraction method, elemental analysis, spectral method (IR), powder X-ray diffraction (XRD), electronic spectra (UV-vis) and photoluminescence properties. The complex crystallizes in the monoclinic space group P21/c with unit cell parameters a = 16.883(2) Å, b = 14.382(2) Å, c = 18.981(3) Å, β = 96.806(2), V = 4576.5(11) Å 3 , and Z = 4.

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