Dynamic and steady-state behaviors of reverse saturable absorption in metallophthalocyanine

Li, Chunfei; Zhang, Lei; Miao, Yang; Wang, Hui; Wang, Yuxiao

doi:10.1103/physreva.49.1149

Cited by 167 publications

(89 citation statements)

References 18 publications

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“…The physical and chemical properties of these materials can be easily tailored by substituting various functional groups at peripheral sites and by incorporating different metal atoms into the ring. All metallo-phthalocyanines do have two similar ground-state absorption bands: the Q-band in the visible region in the 600-800 nm range and aB-band (Soret-band) in the 300-400 nm range [6]. In the spectral window between these two bands, all metaIlo-phthalocyanines have large excited-state absorption.…”

Section: Introductionmentioning

confidence: 99%

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Nanosecond optical limiting response of sandwich-type neodymium dyphthalocyanine in a co-polymer host

et al. 2004

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The nanosecond optical limiting characteristics of sandwich-type neodymium diphthalocyanine in a co-polymer matrix ofpolymethyl 'methacrylate (PMMA) and methyl-2-cyanoacrylate have been studied for the first time. The measurements were performed using 9 ns laser pulses generated from a frequency-doubled Nd:YAG laser at 532 nm waveleliglh. The optical limiting performance of neodymium diphthalocyanine in co-polymer host was studied at different linear transmission. Laser damage threshold was also measured for the doped and undoped co-polymer samples. The optical limiting response is attributed to reverse saturable absorption which is due to excited-state absorption. 02004 Published by Elsevier RV.

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Section: Introductionmentioning

confidence: 99%

“…At short laser pulses, on the picosecond timescale, singlet-state absorption provides non linear attenuation. If the laser pulses are in the nanosecond timescale (~10 ns), the molecules should posscs high triplct yiclds and long triplet lifetimes to attenuate the laser pulses [6].…”

Section: Introductionmentioning

confidence: 99%

Nanosecond optical limiting response of sandwich-type neodymium dyphthalocyanine in a co-polymer host

et al. 2004

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“…Jablonski diagram of excitation and relaxation processes in a molecule. [19] Absorption of the photon at 532 nm leads to the transition of the electron to the vibronic sublevel of the first excited singlet state S 1 . The lifetime of the vibronic sublevel is of subpicosecond range, so only the direct transition S 0 → S 1 can be considered.…”

Section: Treatment Of Magnesium Complexmentioning

confidence: 99%

Synthesis and Study of Physicochemical Properties of New Substituted Tetrathieno[2,3-b]porphyrazines

Dubinina¹,

Dyumaeva²,

Trashin³

et al. 2012

MHC

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Synthetic approach to a new substituted tetrathieno [2,3-b]porphyrazine, its planar and sandwich-type complexes was developed. Aggregation phenomena and spectral properties of the target compounds were investigated by UVVis spectroscopy and AFM. Electrochemical behaviour of the Zn complex was studied in a wide range of potentials (-2.0÷2.0 V). The NLO properties of Zn complex was studied by the z-scan approach.

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“…[22] and < 50 ns in Ref. [23] respectively) as compared to molecules such as metal-free phthalocyanine (T ∼ µs) [22]. Therefore, another crucial question, which is related to QIP, is whether the spin coherence induced by the exchange interaction (J) can survive such fast relaxation of triplet state, i.e., according to Heisenberg's uncertainty principle, a comparison between J and T is needed.…”

Section: Introductionmentioning

confidence: 99%

Exchange interaction between the triplet exciton and the localized spin in copper-phthalocyanine

2014

The Journal of Chemical Physics

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Triplet excitonic state in the organic molecule may arise from a singlet excitation and the following inter-system crossing. Especially for a spin-bearing molecule, an exchange interaction between the triplet exciton and the original spin on the molecule can be expected. In this paper, such exchange interaction in copper-phthalocyanine (CuPc, spin-1 2 ) was investigated from first-principles by using density-functional theory within a variety of approximations to the exchange correlation, ranging from local-density approximation to long-range corrected hybrid-exchange functional. The magnitude of the computed exchange interaction is in the order of meV with the minimum value (1.5 meV, ferromagnetic) given by the long-range corrected hybrid-exchange functional CAM-B3LYP. This exchange interaction can therefore give rise to a spin coherence with an oscillation period in the order of picoseconds, which is much shorter than the triplet lifetime in CuPc (typically tens of nanoseconds). This implies that it might be possible to manipulate the localised spin on Cu experimentally using optical excitation and inter-system crossing well before the triplet state disappears.

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Dynamic and steady-state behaviors of reverse saturable absorption in metallophthalocyanine

Cited by 167 publications

References 18 publications

Nanosecond optical limiting response of sandwich-type neodymium dyphthalocyanine in a co-polymer host

Nanosecond optical limiting response of sandwich-type neodymium dyphthalocyanine in a co-polymer host

Synthesis and Study of Physicochemical Properties of New Substituted Tetrathieno[2,3-b]porphyrazines

Exchange interaction between the triplet exciton and the localized spin in copper-phthalocyanine

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