Two-photon absorption spectroscopy of corroles

Rebane, Alexander; Makarov, Nikolay S.; Drobizhev, Mikhail; Koszarna, Beata; Gałęzowski, Michał; Gryko, Daniel T.

doi:10.1117/12.809357

Cited by 6 publications

(7 citation statements)

References 45 publications

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“…The versatile spectral, electrochemical, and photophysical properties of corroles make them suitable for potential applications − in photodynamic therapy (PDT), cancer diagnosis, molecular catalysis, oxidation, reduction, and group transfer reactions of many organic transformations, photosensitizers for organic solar cells, fluorescence imaging agent, etc. Furthermore, the electron-rich π-system has generated strong interest for the study of NLO properties of these corroles for potential applications in data storage, optical limiting, multiphoton absorption, fluorescence, and surface-enhanced Raman scattering. − Therefore, investigation of photophysical properties of corroles is indispensable for identifying the true potential of these macrocycles in a variety of applications. Furthermore, the knowledge of these properties is imperative for designing efficient corrole-based materials for optoelectronic and solar cell applications.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond to Microsecond Dynamics of Soret-Band Excited Corroles

et al. 2015

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We present a comprehensive photophysical investigation on a series of three corroles (TTC, P-TTC, Ge-TTC dissolved in toluene), employing femtosecond and nanosecond transient absorption spectroscopy (TAS) measurements. Systematic analyses of the TAS data determined the rates and corresponding time constants of photophysical processes: internal conversion (τ IC ) in the 898−525 fs range, vibrational relaxation in the 7.44−13.6 ps range, intersystem crossing in the 033−1.09 ns range, and triplet lifetime (τ triplet ) in the 0.8−3.5 μs range. The estimated triplet quantum yields (Φ triplet ) were in the 0.42−0.61 range. Comparatively, GeTTC displayed faster τ IC and higher Φ triplet . Additionally, the time-dependent density functional theory calculations were performed for the three molecules. The HOMO/LUMO energy levels and the oscillator strengths of various transitions were determined and presented.

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Section: Introductionmentioning

confidence: 99%

Femtosecond to Microsecond Dynamics of Soret-Band Excited Corroles

et al. 2015

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“…These properties open up potential for using corroles in many applications, including diverse areas such as cancer diagnosis, treatment, and solar cell research. Rebane et al [13,14] studied the NLO properties and reported two-photon absorption (2PA) cross sections and spectra of corroles within a broad spectral range of excitation wavelengths, 800-1400 nm. They also observed that the strength of 2PA peak in the Soret region strongly decreased with the electron-withdrawing ability of the side substituents.…”

Section: Introductionmentioning

confidence: 99%

“…They also observed that the strength of 2PA peak in the Soret region strongly decreased with the electron-withdrawing ability of the side substituents. Cho et al [15] studied corrole dimers and obtained superior values of twophoton cross-section compared to the values obtained by Rebane et al [13,14]. Our group has been investigating a number of porphyrins and phthalocyanines for their NLO properties in cw, nanosecond (ns), picosecond (ps) and femtosecond (fs) time domains [16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Picosecond and femtosecond optical nonlinearities of novel corroles

Hamad

Tewari

Giribabu

et al. 2012

J. Porphyrins Phthalocyanines

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We present our results from the experimental and modeling studies of picosecond (ps) and femtosecond (fs) nonlinearities of two novel corroles (a) tritolyl corrole (TTC) (b) triphenyl corrole (TPC) using the Z-scan technique. Both open and closed aperture Z-scan curves were recorded with ~2 ps/~40 fs laser pulses at a wavelength of 800 nm and nonlinear optical coefficients were extracted for both studies. Both the molecules possessed negative nonlinear refractive index (n2) as revealed by signature of the closed aperture data in both (ps and fs) time domains. Picosecond nonlinear absorption data of TPC obtained at a concentration of 5 × 10-4 M demonstrated complex behavior with switching from reverse saturable absorption (RSA) within saturable absorption (SA) at lower peak intensities to RSA at higher peak intensities. TTC data recorded at the similar concentration exhibited saturable absorption (SA) type of behavior at lower peak intensities to switching from RSA with in SA at higher peak intensities. At a concentration of 2.5 × 10-4 M, the ps open aperture data at higher peak intensities illustrated effective three-photon absorption (3PA) for both the molecules. We also report the picosecond spectral dependent Z-scan studies performed at 680 nm, 700 nm, and 740 nm. Nonlinear absorption and refraction of both the samples at these three wavelengths were studied in detail. Femtosecond nonlinear absorption data of TPC and TTC demonstrated the behavior of saturable absorption (SA) at a concentration of 1 × 10-3 M. Solvent contribution to the nonlinearity was also identified. We have also evaluated the sign and magnitude of third order nonlinearity. We discuss the nonlinear optical performance of these organic molecules.

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“…They also observed that the strength of 2PA peak in the Soret region strongly decreased with the electron-withdrawing ability of the side substituents. Cho et al 41 studied Corrole dimers and obtained superior values of two-photon crosssection compared to the values obtained by Rebane et al [39][40] A molecule could be useful for optical limiting applications when studies with ns/ps pulses while it's utility for signal processing or all-optical switching is decided by the femtosecond NLO properties and dynamics. A molecule might be applied for broadband optical limiting or could possess interesting NLO properties at different wavelengths and input intensities.…”

Section: Introductionmentioning

confidence: 82%

“…These properties open up potential for using Corroles in many applications, including diverse areas such as cancer diagnosis, treatment, and solar cell research. Rebane et al [39][40] studied the NLO properties and reported two-photon absorption (2PA) cross sections and spectra of Corroles in the spectral range of 800-1400 nm. They also observed that the strength of 2PA peak in the Soret region strongly decreased with the electron-withdrawing ability of the side substituents.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond and picosecond nonlinear optical studies of Corroles

et al. 2012

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We present our results of nonlinear optical properties of Tritolyl Corrole (TTC) and Triphenyl Corrole (TPC) studied in the form of solution using Z-scan technique with 660 nm, ~2 picosecond (ps) pulses and 800 nm, ~40 femtosecond (fs) pulses excitation. Picosecond open-aperture Z-scan data revealed these molecules exhibited strong saturable absorption. These molecules possessed negative nonlinear refractive index (n 2 ). The estimated value of n 2 was 6×10 -15 cm 2 /W and 8×10 -15 cm 2 /W for TPC and TTC, respectively. We have recently reported NLO properties of Corroles with 800 nm excitation where they exhibited strong two-photon absorption (2PA) at higher intensities and effective two-photon absorption at lower intensities in the ps regime. Femtosecond open aperture Z-scan studies indicated the presence of strong saturable absorption with effective nonlinear absorption coefficients (β) of ~0.8×10 -13 cm/W and ~2.7×10 -13 cm/W for TPC and TTC, respectively. We have also estimated the sign and magnitude of real part of third order nonlinearity through the closed aperture scans. We discuss the nonlinear optical performance of these organic molecules. INTRODUCTIONNovel moieties with strong two-photon (2PA) and three-photon absorption (3PA) cross-sections/coefficients are attractive for potential applications in the fields of photonics and bio-medicine. 1-4 Studies on a variety of molecules with strong 2PA/3PA have been established to be relevant in fluorescence spectroscopy, 3D imaging, and lithography because of high spatial resolution achieved through intensity dependent processes. 3-7 Additionally, they can be used for optical data storage and optical limiting purposes. Several materials such as porphyrins and phthalocyanines that possess such properties have been investigated extensively in recent times by several groups including our group. 8-26 Porphyrins, Phthalocyanines, and Porphycenes are macromolecules with huge number of delocalized π electrons resulting in interesting third order nonlinear optical (NLO) properties leading to extensive applications in optical limiting, all-optical switching, and optical signal processing. [27][28][29][30][31][32][33][34][35][36][37][38] Corroles are tetrapyrrolic molecules maintaining the skeletal structure of Corrin with its three meso carbon positions and one direct pyrrole-pyrrole linkage and possessing the aromaticity of porphyrins 33-38 . Corroles generally show porphyrin type spectra, with strong absorptions in the visible range associated with very highly colored compounds. Furthermore, among the interesting attributes of Corroles are their photo-physical properties. As well, the direct pyrrole-pyrrole linkage seems to give Corroles stronger fluorescence properties than their porphyrin counterparts. These properties open up potential for using Corroles in many applications, including diverse areas such as cancer diagnosis, treatment, and solar cell research. studied the NLO properties and reported two-photon absorption (2PA) cross sections and spectra of Corro...

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Two-photon absorption spectroscopy of corroles

Cited by 6 publications

References 45 publications

Femtosecond to Microsecond Dynamics of Soret-Band Excited Corroles

Femtosecond to Microsecond Dynamics of Soret-Band Excited Corroles

Picosecond and femtosecond optical nonlinearities of novel corroles

Femtosecond and picosecond nonlinear optical studies of Corroles

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