22824-83-5

Upstream product

• 159-66-0 9,9'-spirobifluorene 
• 2113-51-1 2-iodobiphenyl 
• 90-41-5 2-phenylaniline 
• 67665-44-5 9-((1,1'-biphenyl)-2-yl)-9H-fluoren-9-ol 
• 2052-07-5 2-Bromobiphenyl 
• 486-25-9 9-fluorenone 
• 75-36-5 acetyl chloride 

Downstream Products

• 1414942-33-8 2,2'-bis(4-nitro-2-trifluoromethylphenoxy)-9,9'-spirobifluorene 
• 1414942-34-9 2,2'-bis(4-amino-2-trifluoromethylphenoxy)-9,9'-spirobifluorene 

Relevant academic research and scientific papers

Efficient Rare-Earth-Based Coordination Polymers as Green Photocatalysts for the Synthesis of Imines at Room Temperature

Five new rare-earth coordination polymers (CPs) were designed in order to offer a remarkable platform that contains light-harvesting antennas and catalytic active centers to achieve solar-energy conversion as green alternatives in the synthesis of imines. These five new spirobifluorene-containing Ln-CPs, named [Er3(Hsfdc)3(sfdc)3(H2O)]·xH2O (RPF-30-Er), [Ln(Hsfdc)(sfdc)(EtOH)]·S (RPF-31-Ln, where Ln = La, Nd, and Sm and S = H2O or EtOH), and [Ho(Hsfdc)(sfdc)(H2O)] (RPF-32-Ho) (RPF = rare-earth polymeric framework and H2sfdc = 9,9′-spirobi[9H-fluorene]-2,2′-dicarboxylic acid), have been solvothermally synthesized, and their structural features can be described as follows: (i) RPF-30-Er shows a 3D framework in which the inorganic trimers (secondary building units) are cross-linked by Hsfdc- and sfdc2- linkers displaying a pcu topology. (ii) The isostructural RPF-31-Ln series of materials, together with RPF-32-Ho, exhibit a 1D network of chains growing along the a axis with a ribbon-of-rings topology type. The photocatalytic activity of the RPF-n materials was tested in the oxidative coupling of amines using molecular oxygen and air as oxidizing agents under warm light. Among the materials investigated, RPF-31-Nd was chosen to further investigate the approach in the selectivity of different amine derivates.

A two-dimensional porous framework: Solvent-induced structural transformation and selective adsorption towards malachite green

A two-dimensional porous framework SHU-1 could undergo solvent-induced structural transformations to SHU-1a in methanol and SHU-1b in water. SHU-1, SHU-1a and SHU-1b showed selective adsorption towards malachite green.

O-HYDROXY-FUNCTIONALIZED DIAMINES, POLYMIDES, METHODS OF MAKING EACH, AND METHODS OF USE

Embodiments of the present disclosure provide for an ortho (o)-hydroxy-functionalized diamine, a method of making an o-hydroxy-functionalized diamine, an o-hydroxy-functionalized diamine-based polyimide, a method of making an o-hydroxy-functionalized diamine imide, methods of gas separation, and the like.

SPIROBIFLUORENE COMPOUND, COPOLYMER THEREOF, PHOTOCURABLE COMPOSITION COMPRISING THE SAME AND ENCAPSULATED APPARATUS COMPRISING THE SAME

The present invention relates to a spirobifluorene-based compound, a copolymer thereof, a photocurable composition comprising the same, and an encapsulated apparatus comprising the same. The spirobifluorene-based compound according to the present invention can materialize a layer which has low vapor permeability and reduced generation amount of out gas after hardening, and high adhesive force to an inorganic barrier layer. Also, the present invention raises a photocurable rate and materializes a layer in which shift caused by hardening shrinkage stress after hardening does not occur.

Synthesis, Chiral Resolution, and Absolute Configuration of C 2-Symmetric, Chiral 9,9′-Spirobifluorenes

Racemic 2,2′-, 2,2′,7,7′-, and 2,2′,3,3′-substituted 9,9′-spirobifluorenes were synthesised and successfully resolved by HPLC on a Chiralpak IA stationary phase on both analytical and semipreparative scales. Their absolute configurations were determined by comparison of their specific optical rotations with literature data or by comparison of retention times with independently prepared enantiopure material. These compounds are versatile C 2-symmetric building blocks for the formation of more sophisticated cleft-like, chiral molecular architectures. Dissymmetric difunctionalised 9,9′-spirobifluorene derivatives were prepared and resolved by HPLC on a chiral stationary phase on a semipreparative scale. The absolute configurations of the resolved enantiomers were assigned by comparison of specific optical rotations with literature data or retention times of independently prepared enantiomerically pure material.

Self-assembly of metallosupramolecular rhombi from chiral concave 9,9'-spirobifluorene-derived bis(pyridine) ligands

Two new 9,9'-spirobifluorene-based bis(4-pyridines) were synthesised in enantiopure and one also in racemic form. These ligands act as concave templates and form metallosupramolecular [(dppp)2M2L2] rhombi with cis-protected [(dppp)Pd]2+ and [(dppp)Pt]2+ ions. The self-assembly process of the racemic ligand preferably occurs in a narcissistic self-recognising manner. Hence, a mixture of all three possible stereoisomers [(dppp)2M2{(R)-L}2](OTf)4, [(dppp)2M2{(S)-L}2](OTf)4, and [(dppp)2M2{(R)-L}{(S)- L}](OTf)4 was obtained in an approximate 1.5:1.5:1 ratio which corresponds to an amplification of the homochiral assemblies by a factor of approximately three as evidenced by NMR spectroscopy and mass spectrometry. The racemic homochiral assemblies could also be characterised by single crystal X-ray diffraction.

Novel soluble and optically active polyimides containing axially asymmetric 9,9′-spirobifluorene units: Synthesis, thermal, optical and chiral properties

A new optically active spirobifluorene-based diamine monomer, (R)-2,2′-bis(4-amino-2-trifluorom-ethylphenoxy)-9,9′- spirobifluorene, was synthesized using (R)-2,2′-dihydroxy-9,9′- spirobifluorene as starting material. The absolute stereochemistry of the chiral diamine was determined by single crystal X-ray diffraction. A series of novel chiral polyimides were prepared from the diamine with various aromatic dianhydrides via a two-stage process with chemical imidization method. All these optically active polyimides were readily soluble in many organic solvents and could afford flexible, tough and transparent films with an UV-vis absorption cutoff wavelength at 351-375 nm. The glass transition temperatures of these polyimides were recorded between 262 and 281°C by differential scanning calorimetry, and the 5% weight loss occurred at temperatures above 510°C. The specific rotations of these chiral polyimides ranged from -48.5°to +73.0°depending on the structures of the aromatic dianhydrides. All the optically active polyimides exhibited high chiral stability in solid state or in DMAc solvent at high temperature due to introduction of chiral spirobifluorone group into polymer backbones. The circular dichroism (CD) spectroscopic properties of these chiral polyimides in tetrahydrofuran solutions were also studied.

Synthesis of diaza-analogue of fluorenone and spirobifluorene

The effective syntheses of diaza-analogue of fluorenone and spirobifluorene with N=N bond has been conducted with the using of ninhydrin and corresponding acetyl derivatives of arenes. Single-crystal X-ray diffraction of 2-(spirobifluoren-2-yl)-3,4-dizasp

Enantiomerically pure C2-symmetric dinuclear silver(I) and copper(I) complexes from a bis(2,2′-bipyridine)-substituted 9,9′-spirobifluorene ligand

We have prepared a new bis(bipyridyl) ligand 1 based on a chiral 9,9′-spirobifluorene core in both enantiomerically pure forms. This ligand was found to undergo diastereoselective self-assembly to optically pure dinuclear coordination compounds upon coordination to copper(I) and silver(I) ions. Surprisingly, however, the resulting diastereomer was not found to be D2 -symmetric which is usually found for similar bis(bidentate) ligands, but rather C2 -symmetric with differently configurated metal centers.

DIOL, AND POLYCARBONATE RESIN OR POLYESTER RESIN

A diol from which a resin material having high processability and a high refractive index can be manufactured, a polycarbonate resin and a polyester resin which is a polymer of the diol, and a molded article and an optical element formed of the polymer. T