Wydział Chemii

Balahoju Shivaprasad Achary

Sabapathi Gokulnath

Samrat Ghosh

Madoori Mrinalini

Seelam Prasanthkumar

Lingamallu Giribabu

2016

Chemistry-An Asian Journal

11

3498-3502

10.1002/asia.201601363

Naukowa

Angielski

Artykuł

Charge‐transfer (CT) complexes of near‐infrared absorbing systems have been unknown until now. Consequently, structural similarities between donor and acceptor are rather important to achieve this phenomenon. Herein, we report electron donors such as non‐fused diporphyrin‐anthracene (DP), zinc diporphyrin‐anthracene (ZnDP) and fused zinc diporphyrin‐anthracene (FZnDP) in which FZnDP absorbs in NIR region and permits a CT complex with the electron acceptor, perylene diimide (PDI) in CHCl₃ exclusively. UV/Vis‐NIR absorption, ¹H NMR, NOESY and powder X‐ray diffraction analysis demonstrated that the CT complex formation occurs by π–π stacking between perylene units in FZnDP and PDI upon mixing together in a 1:1 molar concentration in CHCl₃, unlike non‐fused ZnDP and DP. TEM and AFM images revealed that the CT complex initially forms nanospheres leading to nanorods by diffusion of CH₃OH vapors into the CHCl₃ solution of FZnDP/PDI (1:1 molar ratio). Therefore, these CT nanorods could lead to significant advances in optical, biological and ferroelectric applications.

Charge transfer, donor-acceptor systems, fused diporphyrin, nanorods, NIR absorption

http://dx.doi.org/10.1002/asia.201601363

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