2019
DOI: 10.1002/ange.201814412
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Nonlinear Optical Switching in Regioregular Porphyrin Covalent Organic Frameworks

Abstract: Covalent organic frameworks (COFs) have garnered immense scientific interest among porous materials because of their structural tunability and diverse properties. However,the response of such materials towardlaser-induced nonlinear optical (NLO) applications is hardly understood and demands prompt attention. Three novel regioregular porphyrin (Por)-based porous COFs-Por-COF-HH and its dual metalated congeners Por-COF-ZnCu and Por-COF-ZnNi-have been prepared and present excellent NLO properties.N otably,i ntens… Show more

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Cited by 49 publications
(24 citation statements)
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“…Covalent organic frameworks (COFs), as one of emerging class of porous crystalline materials built from organic building blocks connected by covalent bonds, [1][2][3][4][5][6][7][8][9] have attracted widespread attention due to their various potential applications including gas adsorption and separation, [10][11][12][13] catalysis, [14][15][16][17][18] optoelectronics, [19][20][21][22] etc. [23][24][25][26][27][28][29][30][31] The functional diversity of COFs originates from their high structural tunability and versatility, in which a large variety of organic building blocks can be interconnected to create an almost infinite number of networks. [6][7][8][9] The overall properties of such porous materials are associated with their compositions and morphologies, but more critically rely on their network topologies.…”
Section: Introductionmentioning
confidence: 99%
“…Covalent organic frameworks (COFs), as one of emerging class of porous crystalline materials built from organic building blocks connected by covalent bonds, [1][2][3][4][5][6][7][8][9] have attracted widespread attention due to their various potential applications including gas adsorption and separation, [10][11][12][13] catalysis, [14][15][16][17][18] optoelectronics, [19][20][21][22] etc. [23][24][25][26][27][28][29][30][31] The functional diversity of COFs originates from their high structural tunability and versatility, in which a large variety of organic building blocks can be interconnected to create an almost infinite number of networks. [6][7][8][9] The overall properties of such porous materials are associated with their compositions and morphologies, but more critically rely on their network topologies.…”
Section: Introductionmentioning
confidence: 99%
“…[45] The TPA cross section was derived from the two-photon emission spectra using a known standard Rhodamine 6G dye (R6G) in methanol with concentration of 10 −5 m as reference (Figure S21, Supporting Information). The TPA cross section of cyano-sp 2 c-COF was determined to be about 1225 GM per repeating unit (1 GM = 10 −50 cm 4 s photon −1 ) at 800 nm according to the literature reported calculation (see more details in Methods), [63][64][65] 1064 GM at 750 nm and 1073 GM at 780 nm and in methanol, which is higher than those of the corresponding model compound (≤104 GM) and many other previously reported TPA materials (Figure 4c and Table S3, Supporting Information).…”
Section: Resultsmentioning
confidence: 99%
“…Considering the fact that both CN and CC can offer effective conjugation, some COFs with imine linkages have been demonstrated as potential nonlinear materials recently. [34,35,65,72] However, the absence of strong electron acceptors or donors for imine-COF causes less efficient ICT and thus suppress the TPA response according to the literature. [34,40] Furthermore, TPA and strong OPF are simultaneously required for efficient TPF materials, but the absolute PLQY of imine-COF in solid state is only 0.1%.…”
Section: Resultsmentioning
confidence: 99%
“…Liu et al, 2017), light generation and modulation (J. Chen et al, 2018), optical parametric amplification (Kumbhakar and Kobayashi, 2007;Popov and Shalaev, 2006), laser frequency conversion (D. Hou et al, 2018a), modulators (Grote et al, 2002), and optical switches (Biswal et al, 2019;. In addition, nonlinear optics have remarkable applications in dynamic image processing (Van Steenwinckel et al, 2001), sensing (Ray, 2010), high resolution imaging (Miller et al, 2002), optical computing (Hutchinson and Milburn, 2004), optical fiber communication (Arivuoli, 2001), optical data storage (Iliopoulos et al, 2010), and materials analysis (Y. R. Shen, 1989).…”
Section: Introductionmentioning
confidence: 99%