1,2,5-Azadiborolane as a Building Block for Inorganic-Organic Hybrid Polymers

被引:0
作者
Maier, Matthias [1 ,2 ]
Zeh, Vivien [1 ,2 ]
Munker, Nadine [1 ,2 ]
Glock, Julian [1 ,2 ]
Oberdorf, Kai [3 ]
Ayhan, Ozan [1 ,2 ]
Lichtenberg, Crispin [3 ]
Helten, Holger [1 ,2 ]
机构
[1] Julius Maximilians Univ Wurzburg, Inst Inorgan Chem, D-97074 Wurzburg, Germany
[2] Inst Sustainable Chem & Catalysis Boron ICB, D-97074 Wurzburg, Germany
[3] Philipps Univ Marburg, Dept Chem, Hans Meerwein Str 4, D-35032 Marburg, Germany
关键词
BN compounds; boron; hybrid polymers; main group polymers; polycondensation; polymers; BORON-NITROGEN ANALOGS; AMINE-BORANES; BORATION COPOLYMERIZATION; THERMAL-DECOMPOSITION; CONJUGATED POLYMERS; SYNTHETIC METHODS; DERIVATIVES; COMPLEXES; PHOSPHINE; POLYAMINOBORANES;
D O I
10.1002/ejic.202300490
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The incorporation of BN units in organic scaffolds by isoelectronic/isosteric substitution of selected CC couples has emerged as an efficient tool to produce new materials with useful properties and functions. The knowledge about BN-doped inorganic-organic hybrid polymers, however, is still rather scarce. This is especially true for linear or cyclolinear macromolecules that feature longer inorganic chains. Herein, we introduce 1,2,5-azadiborolane as a polymer building block for the first time. An attempt to apply it for the synthesis of a cyclolinear poly(iminoborane) resulted after only two B-N coupling events in the formation of a molecular compound comprising a chain of three nitrogen and two boron atoms - as confirmed by single-crystal X-ray diffractometry. In combination with a p-phenylene diamine-based co-monomer, we accomplished to incorporate the 1,2,5-azadiborolane into a hybrid polymer of considerable molecular weight that features a B2N3 chain. We additionally synthesized a small molecular model compound for the polymer and characterized it crystallographically as well. Comparison of the UV-vis spectra of the monomer, the oligomer, and the polymer revealed systematic red-shifts of the longest-wavelength absorption band with increasing number of BN units in the chain. 1,2,5-Azadiborolane is introduced as a new building block for BCN hybrid polymers. An attempt to use it as a monomer for a cyclolinear poly(iminoborane), only afforded two B-N coupling events. On the other hand, in combination with a p-phenylene diamine-based co-monomer, we obtained hybrid polymers with an average degree of polymerization exceeding 300.+image
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页数:7
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