Naphthobipyrrole-Derived Sapphyrins: Rational Synthesis, Characterization, Nonlinear Optical Properties, and Excited-State Dynamics

作者：Sarma Tridib; Anusha Puliparambil Thilakan; Pabbathi Ashok; Rao Soma Venugopal; Panda Pradeepta K^*

来源：Chemistry - A European Journal, 2014, 20(47): 15561-15570.

DOI：10.1002/chem.201403832

• expanded porphyrins
• excited-state dynamics
• porphyrinoids
• nonlinear optics
• sapphyrins

Two new free-base beta-octa and hexaalkyl naphthobipyrrole-derived sapphyrins are reported along with various salts thereof. One of them has substituents at all of its beta positions, whereas the pyrrole unit opposite to the bipyrrolic moiety is unsubstituted in the other. The effect of bipyrrole fusion on the structure of sapphyrins was explored. Interestingly, an unprecedented sandwiched supramolecular aqua-bridged free-base sapphyrin dimer was also characterized in the solid state. Further, the effect of anions on the third0order nonlinear optical properties of these sapphyrins were explored in the salt form, along with their detailed excited-state dynamics by both degenerate and nondegenerate pump-probe studies.

• 出版日期2014-11-17