By Lin Pu
Chiral fabrics were studied within the division of Chemistry on the college of Virginia for purposes in components like uneven catalysis, enantioselective fluorescent sensing, and optical/electrical fabrics. Optically lively 1,1 -binaphthyl molecules are used to construct novel chiral polymers, dendrimers, macrocycles, and acyclic molecules. 1,1 -Binaphthyl molecules are selected due to their remarkably solid chiral configuration in addition to their excessive uneven inductions in lots of approaches. during this publication, either the elemental wisdom concerning the 1,1 -binaphthyl molecules and the synthesis of the structurally different 1,1 -binaphthyl-based fabrics are defined. The functions of those fabrics in quite a few fields also are mentioned. This booklet will function a reference for graduate scholars in addition to different execs operating within the comparable fields. advent approximately 1,1 -Binaphthyls major Chain Chiral-Conjugated Polymers Polybinaphthyls in uneven Catalysis uneven Catalysis via BINOL and Its Non-Polymeric Derivatives Enantioselective Fluorescent Sensors in accordance with 1,1 -Binaphthyl Derived Dendrimers, Small Molecules and Macrocycles Miscellaneous experiences on fabrics regarding 1,1 -Binaphthyls
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Extra resources for 1, 1-binaphthyl-based Chiral Materials: Our Journey
5, CH2 Cl2 ). This polymer gives fairly well-resolved NMR spectra that support its structure. In its 13 C NMR spectrum, four diﬀerent alkyne carbon signals are observed. 16 gives UV absorptions at λmax = 238 and 366 nm and shows strong emissions at 420, 464 and 500 (sh) nm. 1). 16. 03 × 105 (385 nm). Crown ether functions are incorporated into the binaphthyl-based chiral polyaryleneethynylenes. 18 in 86% yield. This polymer is soluble in common organic solvents. 0). 95, THF)}. 18 in methylene chloride solution displays λmax at 240, 296, 334 and 378 nm.
35. 36b has good solubility in chloroform and methylene chloride, but it is only partially soluble in benzene and poorly in hexane. Its UV absorption undergoes about 20–30 nm red shift as the solvent polarity as well as the solubility of the polymer increases from hexane to benzene and methylene chloride. 36b shows a strong emission at 490 nm, which also undergoes about 20–30 nm red shift in benzene and methylene chloride. The ﬂuorescence intensity of this polymer in hexane is much stronger than that in benzene and methylene chloride.
11c, respectively. In general, using Pd(PPh3 )4 produces higher molecular weight polymer than using PdCl2 . 14. 10b. 11a–c. All these polymers are soluble in organic solvents. 11c. 11a–c, the optical rotation of these chiral polymers increases with increasing molecular weight of the polymers. 9. 12 inverts the optical rotation. 10c is stable up to 396◦ C. From 396 to 486◦C, this polymer loses its alkyl groups. After the loss of the alkyl groups, it becomes extremely stable with no signiﬁcant weight loss up to 800◦ C.