Abstract:Sapphyrin is a pentapyrrolic expanded porphyrin with a 22π aromatic character. Herein, we report the synthesis of a 20π antiaromatic sapphyrin isomer 1 by oxidative cyclization of a pentapyrrane precursor P5 with a terminal β‐linked pyrrole. The resulting isomer 1, containing a mis‐linked bipyrrole unit in the skeleton, exhibits a reactivity for further oxidation due to the distinct antiaromatic electronic structure, affording a fused macrocycle 2, possessing a spiro‐carbon‐containing [5.6.5.6]‐tetracyclic str… Show more
“…A typical porphyrin dye has a Soret band within 400–450 nm with a high molar extinction coefficient and moderate Q bands within 500–700 nm. The excellent photoelectronic properties and rich structural diversities of porphyrins 30–34 enable fabrication of DSSCs with efficiencies of over 13%. 35,36 In brief, the absorption ability of the sensitizer is the most important factor for achieving high efficiencies.…”
With the advantages of environmental friendliness, easy fabrication, and rich colors, dye-sensitized solor cells (DSSCs) are promising for applications in architectural decoration as well as power supply for low energy...
“…A typical porphyrin dye has a Soret band within 400–450 nm with a high molar extinction coefficient and moderate Q bands within 500–700 nm. The excellent photoelectronic properties and rich structural diversities of porphyrins 30–34 enable fabrication of DSSCs with efficiencies of over 13%. 35,36 In brief, the absorption ability of the sensitizer is the most important factor for achieving high efficiencies.…”
With the advantages of environmental friendliness, easy fabrication, and rich colors, dye-sensitized solor cells (DSSCs) are promising for applications in architectural decoration as well as power supply for low energy...
“…[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] In addition, the N-confused pyrrole unit may trigger interesting macrocycle transformations and thus further modulate the coordination behavior. [49][50][51][52][53][54][55] These metal complexes are promising for applications in various areas like catalytic, photoelectric and biomedical materials. [56][57][58][59][60][61][62][63][64][65][66][67] To further enrich the coordination chemistry of hexaphyrins and probe the underlying property-structural correlations for porphyrinoid complexes, herein we report N-confused dithiahexaphyrin 1, which has been synthesized by simultaneously incorporating an N-confused pyrrole unit and a bithiophene unit into a hexaphyrin framework (Fig.…”
Section: Introductionmentioning
confidence: 99%
“…31–48 In addition, the N-confused pyrrole unit may trigger interesting macrocycle transformations and thus further modulate the coordination behavior. 49–55 These metal complexes are promising for applications in various areas like catalytic, photoelectric and biomedical materials. 56–67…”
To further enrich the coordination chemistry of hexaphyrins and probe the underlying property-structural correlations, N-confused dithiahexaphyrin(1.1.1.1.1.0) (1) with 26 π-electron Hückel aromaticity was synthesized. Based on its unprecedented two unsymmetrical...
“…The neo-confused porphyrin 4 is a tetrapyrrolic macrocycle in which the four pyrrole rings were connected by four meso carbons and one meso carbon pyrrole nitrogen atom is directly linked . In due course of time, many norrole analogues such as C-fused norrole, N ∧ Norrole, and other expanded norroles have been reported. These studies have inspired us to synthesize a core-modified norrole analogue called oxanorrole 5 which contains a furan ring in place of one of the pyrrole rings in the norrole framework using readily available precursors .…”
Oxidative cyclization of open chain thiabilanes yielded
the first
examples of unique piperazine bridged thianorrole dimers instead of
the expected thianorrole monomer. In the thianorrole dimer, the two
thianorrole monomeric units are linked via two direct pyrrole C–C
bonds by involving the inverted pyrrole and adjacent pyrrole rings
of each thianorrole macrocycle and generate a six-membered piperazine
ring that bridges the two thianorrole macrocycles. The spectral studies
indicated that the thianorrole dimers are nonaromatic in nature.
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