Molecular Structures of the Products of a Diphosphonate Ester Building Block with Lewis Bases

Molecules

Yufeng Li¹  Fangfang Jian¹ 

[1] Microscale Science Institute, Weifang University, Weifang 261061, China; E-Mail:

关键词: phosphonate ester;    synthesis;    crystal structure;    fluorescence;   

DOI  :  10.3390/molecules200814435

来源: mdpi

【 摘 要 】

By treating a suitable Wittig reagent under acid conditions, the phosphonate ester 1,4-bimethylenebenzene phosphonate ethyl ester (H₂[BBPE], 1) was obtained. As a building block, compound 1 has been reacted with the Lewis-base N,N-dimethylpiperazine, ammonia and NaOH yielded compounds 2–4. The crystal structures show that a 1D chain forming a tubular channel is constructed through hydrogen bonds in 1; hydrogen bonds form two 1D chains with left-hand and right-hand helixes and form 3D networks in compound 2; 1D hydrogen-bond chains are further connected together to afford a 3D network architecture in compound 3; the phosphonate is coordinated by two Na atoms which present different coordination environments in compound 4. Additionally, the relationships between the structure and fluorescence of the four compounds in the solid state and in different solvents have also been studied at room temperature.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.