308086-87-5

Upstream product

• 37942-07-7 3,5-di-tert-butyl-2-hydroxybenzaldehyde 
• 95-54-5 1,2-diamino-benzene 

Downstream Products

• 308086-79-5 (C₄H₉)2OC₆H₂CHNC₆H₄NH₂Ga(CH₃)2 
• 308086-82-0 ((C₄H₉)2OC₆H₂CHNC₆H₄NH₂)2AlCl 
• 308086-81-9 (C₄H₉)2OC₆H₂CHNC₆H₄NH₂Ga(CH₃)Cl 
• 1356544-80-3 C₄₃H₄₂N₂O₃ 
• 351498-24-3 (N,N'-phenylenebis(3,5-di-tert-butylsalicylideneiminato))zinc(II) 

Relevant academic research and scientific papers

Well-Designed Unsymmetrical Salphen-Al Complexes: Synthesis, Characterization, and Ring-Opening Polymerization Catalysis

The unsymmetrical salphen ligand (3,5-tBu-1-OH-C6H2)CHN-C6H4-NCH(3-Ph-1-OH-C6H3) (tBu-PhLH2) was designed and synthesized to support aluminum complexes. Its symmetric analogues, (3,5-tBu-1-OH-C6H2)CHN-C6H4-NCH(3,5-tBu-1-OH-C6H2) (tBuLH2) and (3-Ph-1-OH-C6H3)CHN-C6H4-NCH(3-Ph-1-OH-C6H3) (PhLH2), were also explored and compared. The methane elimination reactions between ligands and AlMe3 resulted in formation of tBu-PhLAlMe (1),tBuLAlMe (2), and PhLAlMe (3) in high yields, which were characterized by elemental analysis, 1H and 13C NMR. The coordination geometries of unsymmetrical and symmetric ligands in 1 and 2 were studied by X-ray diffractions, which revealed a five-coordinated distorted square-pyramidal geometry around Al centers. The aluminum methyl compounds 1-3 reacted with BnOH at 70 °C to give tBu-PhLAlOBn (4), tBuLAlOBn (5), and PhLAlOBn (6), respectively, which existed as monometallic species in solution as indicated by NMR studies. However, the aluminum isopropoxide prepared by the reaction of tBu-PhLH2 with 1 equiv of Al(OiPr)3 contained three species, one monometallic tBu-PhLAlOiPr (7) and two bridged dimers μ-O2-(cis-tBu-PhLAlOiPr)2 (8) and μ-O2-(trans-tBu-PhLAlOiPr)2 (9). The catalytic performances of unsymmetrical 4 for the ring-opening polymerization of racemic lactide (rac-LA) were preliminarily studied and compared to those of symmetric 5 and 6.

Direct C-C coupling of two Ni-salphen complexes to yield dinickel-disalphen complexes with symmetric and non-symmetric substitution-patterns

The synthesis of symmetric and non-symmetric 5,5′-linked disalophen Ni(ii) complexes by the Suzuki-Miyaura-reaction is reported. Also, the synthesis and structural characterization of four Ni(ii)-precursor complexes are presented. The 5-Br-substituted mononuclear complexes 4 and 5 are coupled to the pinacolborane substituted complexes 6 and 7 yielding the four dinuclear dinickel complexes 8-11 in good yields. The crystal structure of dinuclear complex 8 was obtained revealing a coplanar arrangement between the two salophen fragments. Electronic spectra as well as DFT-calculations on the ground states and excitation energies are reported and they reveal a small coupling between the electronically saturated Ni-salophen complexes.

Preparation method and application of N,N'-salicylaldehyde-diphenylphosphinobenzaldehydediamine aluminum compound

The invention discloses a preparation method of an N,N'-salicylaldehyde-diphenylphosphinobenzaldehydediamine aluminum compound, and an application of the compound in the field of ring-opening polymerization of lactone and lactide. The N,N'-salicylaldehyde-diphenylphosphinobenzaldehydediamine aluminum compound has the advantages of convenience in preparation, low cost and stable properties; the compound has a novel structure, and contains a plurality of functional groups; the preparation method has the advantages of high activity and good controllability during catalytic ring-opening polymerization of lactone, and inhibition of chain transfer and chain termination; and the prepared polyester polymer material as a controllable molecular weight and a low molecular weight distribution.

Conjugated tri-nuclear salen-Co complexes for the copolymerization of epoxides/CO2: Cocatalyst-free catalysis

A novel trinuclear salen-Co(iii) complex 1 was designed for carbon dioxide (CO2) and propylene oxide (PO) copolymerization. Due to its conjugated structure, the trinuclear complex 1 system showed a synergistic effect with high activity at low catalyst loadings. In contrast, the corresponding mononuclear complex 2 system almost lost its activity under the same conditions. Unexpectedly, a conjugated effect in the absence of a nucleophilic cocatalyst was discovered, in which complex 1 showed unusual activity even under 0.1 MPa pressure of CO2. This is the first example of PO/CO2 copolymerization using salen-Co(iii) as the catalyst without the aid of a cocatalyst as the stabilizing cation. Moreover, complex 1 showed great tolerance to H2O in the reaction system, and the activity increased efficiently with the addition of H2O. The induction period was scarcely observed in the copolymerization by in situ spectroscopy. The copolymerization mechanism for complex 1 without any cocatalyst was postulated based on rationally designed experiments, and the pathway provided new insight into the nature of the true initiating intermediate. Complex 1 could also catalyze the copolymerization of lactide (LA), PO and CO2 without a nucleophilic cocatalyst to produce multiblock copolymers. The stabilization and distinct catalytic activity of trinuclear complex 1 could be attributed to the change of the electrophilicity of the Co(iii) center generated from the specific electronic interactions among the three salen-Co(iii) subunits.

Preparation method and application of asymmetric N,N'-bis(salicylaldehyde)o-phenylenediamine aluminum compound

The invention discloses a preparation method of an asymmetric N,N'-bis(salicylaldehyde)o-phenylenediamine aluminum compound LAlX and application of the compound in ring opening polymerization of lactone and lactide. The asymmetric N,N'-bis(salicylaldehyde)o-phenylenediamine aluminum compound LAlX has very obvious advantages that the raw materials are easily available, the synthetic route is simple, the product yield is high, the property is stable, a prepared product has rich and changeable structures, the catalytic performance is easy to control, and the product can meet requirements of different ring opening polymerization of lactone and lactide; and a prepared aliphatic polyester high polymer material has controllable structure and performance and can meet the requirements of industrial departments.

Crowded bis-(M-salphen) [M = Pt(II), Zn(II)] coordination architectures: Luminescent properties and ion-selective responses

For binuclear luminescent host systems, cooperativity between metal-organic moieties becomes feasible with regards to photophysical properties and sensing behavior. A new class of conformationally rigid binuclear platinum(II) and zinc(II) complexes bearing tetradentate aromatic Schiff base (salphen) ligands with limited rotational freedom has been prepared and characterized, and the molecular structure of a (Pt-salphen)2 derivative has been determined by X-ray crystallography. Their UV-vis absorption and emission properties have been investigated and are tentatively ascribed to different excited states depending on the metal and the extent of intramolecular π-stacking interactions. Colorimetric and phosphorescent responses by the bis-Pt(II) complexes in the presence of selected metal ions have been observed. The nature of the host-guest interactions has been examined by quantitative binding studies, mass spectrometry and DFT calculations, and through comparisons with control complexes.