Strong two-photon absorption properties and ultrafast pump-probe studies of novel porphyrin derivatives

Swain, Debasis; Rana, Anup; Panda, Pradeepta K.; Rao, S. Venugopal

doi:10.1016/j.cplett.2014.07.013

Cited by 40 publications

(27 citation statements)

References 55 publications

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“…2 shows the UV-visible spectra of TPP, TPP(CN) 4 , and TPP(OMe) 4 in dichloromethane (CH 2 Cl 2 ). The linear absorption spectra of these molecules all exhibit a strong Soret absorption band near ultraviolet region, and a series of weak Q-bands in the visible spectral region, which are typical characters of porphyrins [7,20,32]. The Soret absorption bands of TPP, TPP(CN) 4 , and TPP(OMe) 4 all center around 420 nm, and the Q-bands are located at 500-700 nm, respectively.…”

Section: Nonlinear Measurementsmentioning

confidence: 97%

“…Furthermore, the related photophysical parameters can be extracted. Initially we suppose that the lifetimes of S 2 and T 2 states are extremely short and in the order of hundreds of femtosecond [20,50,51], hence the population stayed at S 2 and T 2 could be neglected. Moreover, the relaxation time from T 1 to S 0 is quite long, which is set as dozens of microsecond in the experiment [40].…”

Section: Model Interpretationmentioning

confidence: 99%

“…5, which is a general model to describe excited-state absorption of porphyrins [4,20,48,49]. Under illumination an initial photon of 532 nm is absorbed and promotes the electrons from S 0 to the first excited singlet state S 1 .…”

Section: Model Interpretationmentioning

confidence: 99%

“…The second-order molecular hyperpolarizabilities of heteroleptic phthalocyanine (Pc) and TPP triple decker compounds bridged by samarium are found to be an enhancement of about three orders of magnitude as compared to metal-free Pc and TPP [26]. By structural modification, an analogue of TPP with one pyrrole ring inverted named N-confused tetraphenylporphyrin (NCTPP) is designed and studied by a series of spectroscopic measurements [18][19][20]. The S 1 state lifetime of NCTPP is extracted to be 1.75 ns, which is much shorter than that of TPP (12.2 ns) [27].…”

Section: Introductionmentioning

confidence: 99%

“…TPP was first studied in 1985 [14], and shows a typical reverse saturable absorption (RSA). The photophysical response of TPP could be improved or tuned by insertion of different metals in the porphyrin core or by addition of suitable substituents (both at meso-and b-positions), or by proper structural modification [15][16][17][18][19][20][21][22][23][24][25]. For grafting peripheral substituents, when new Zn(II) tetraphenylporphyrin (ZnTPP) derivatives was functionalized with electron-rich d 6 -transition metal alkynyl complexes at their periphery, a remarkably large effective two-photon absorption (TPA) cross-sections in the visible range for these compounds can be observed [16].…”

Section: Introductionmentioning

confidence: 99%

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Modulation of internal conversion rate and nonlinear absorption in meso-tetraphenylporphyrins by donor/acceptor substitutes

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Xiao

et al. 2015

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Section: Nonlinear Measurementsmentioning

confidence: 97%

Section: Model Interpretationmentioning

confidence: 99%

Section: Model Interpretationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modulation of internal conversion rate and nonlinear absorption in meso-tetraphenylporphyrins by donor/acceptor substitutes

Qian

Xiao

et al. 2015

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Nonlinear Optical Switching in Regioregular Porphyrin Covalent Organic Frameworks

et al. 2019

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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 ntensity-dependent NLO switching behavior was observed for these Por-COFs,w hichi sh ighly desirable for optical switching and optical limiting devices. Moreover,t he efficient p-conjugation and charge-transfer transition in ZnCu-Por-COF enabled ahigh nonlinear absorption coefficient (b = 4470 cm/GW) and figure of merit (FOM = s 1 /s o ,3565) value compared to other state-of-the-art materials, including molecular porphyrins (b % 100-400 cm/GW), metalorganic frameworks (MOFs; b % 0.3-0.5 cm/GW), and graphene (b = 900 cm/GW). Molecules/materialswithinherentnonlinearoptical(NLO)properties have profound importance in telecommunications, data storage,d isplay technologies,s ensors,a nd biomedical devices. [1] In this regard, molecular porphyrins have been widely studied because of their versatile optical and electrochemical properties,large and fast NLO responses,possibility of incorporating aw ide range of metals,a nd their good thermochemical stabilities for optical limiting and optical switching applications. [2] Nonetheless,t oenhance and tune optical nonlinearities of singular porphyrin moieties,b athochromic shifting of their absorption bands by large p-electron delocalization is crucial, which becomes possible through de novo design of integrated porphyrin units featuring extended p-conjugation. [3, 4] Along this line,w ep ropose ap orphyrin-linked covalent organic framework (COF) [5] as model system, wherein enhancement and switching of the NLO response can be studied by manipulation of the framework. Among the recognized crystalline materials, COFs are known for being mechanically robust and offering ahighly accessible surface area. Thestructural and electronic tunability of COFs have garnered particular interest in research areas such as adsorption/storage, [6] chemical sensors, [7] electronics, [8] and catalysis. [9] Despite such potential, COFs comprising porphyrin units have not been explored as NLO materials.F or this purpose,aregioregular ordering of multiple metal centers in ac rystalline 2D porphyrin framework-preferably without ap ost-synthetic modification-is desirable.T his challenging objective [10] has great potential in optoelectronics and photo/electrocatalysis applications.Herein, we present aconjugated imine-linked porphyrinhomopolymeric COF (Por-COF-HH; Figure 1a)prepared by Schiff base A4B4 condensation of 5,10,15,20-tetrakis(4-formylphenyl)-21H,23H-porphyrin (TFPP) and 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphyrin (TAPP). Adopting the same pathway,w ea lso synthesized regioregular...

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Nonlinear Optical Switching in Regioregular Porphyrin Covalent Organic Frameworks

et al. 2019

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Strong two-photon absorption properties and ultrafast pump-probe studies of novel porphyrin derivatives

Cited by 40 publications

References 55 publications

Modulation of internal conversion rate and nonlinear absorption in meso-tetraphenylporphyrins by donor/acceptor substitutes

Modulation of internal conversion rate and nonlinear absorption in meso-tetraphenylporphyrins by donor/acceptor substitutes

Nonlinear Optical Switching in Regioregular Porphyrin Covalent Organic Frameworks

Nonlinear Optical Switching in Regioregular Porphyrin Covalent Organic Frameworks

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