Raman Study of the Rigidity of Penta-p-phenylene Derivatives Used as Legs in Molecular Tripods

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• 作者：Isabel L&oacute ; pez-Toc&oacute ; n ; Daniel Pelá ; ez ; Juan Soto ; Rodrigo Rico ; Chengzhi Cai ; Juan M. L&oacute ; pez-Romero ; Juan C. Otero
• 刊名：Journal of Physical Chemistry B
• 出版年：2008
• 出版时间：May 1, 2008
• 年：2008
• 卷：112
• 期：17
• 页码：5363 - 5367
• 全文大小：355K
• 年卷期：v.112,no.17(May 1, 2008)
• ISSN：1520-5207

文摘

Molecular planarity of penta-p-phenylene (P5P) and several substituted derivatives with four side chains ofvarious lengths, including deca(ethylene glycol) groups, is discussed by considering the changes in the intensityratio between the Raman bands recorded at 1280 and 1220 cm^-1. The intensity ratio between both bandsI₁₂₈₀/I₁₂₂₀ shows a small increase with the size of the substituent, indicating a high rigidity for all thesecompounds, even those with long oligo(ethylene glycol) side chains. This result is important given that thesephenylene derivatives are versatile building blocks for the construction of nanometric tripod-shaped adsorbatesfor biological applications since the side chains should prevent the nonspecific interaction with proteins.