Effects of extending the π-conjugation of the acetylide ligand on the photophysics and reverse saturable absorption of Pt(ii) bipyridine bisacetylide complexes

2016 ◽  
Vol 18 (41) ◽  
pp. 28674-28687 ◽  
Author(s):  
Taotao Lu ◽  
Chengzhe Wang ◽  
Levi Lystrom ◽  
Chengkui Pei ◽  
Svetlana Kilina ◽  
...  
Keyword(s):  
Excited State ◽  
Excited States ◽  
Substituent Effect ◽  
Excited State Absorption ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Triplet Excited State ◽  
Near Ir ◽  
Terminal Substituent ◽  
Acetylide Ligand

Extending the acetylide ligand π-conjugation diminishes the terminal substituent effect on the lowest excited states, but expands the triplet excited-state absorption to the near-IR region.

Photophysics and reverse saturable absorption of cationic dinuclear iridium(iii) complexes bearing fluorenyl-tethered 2-(quinolin-2-yl)quinoxaline ligands

2021 ◽  
Author(s):  
Cuifen Lu ◽  
Taotao Lu ◽  
Peng Cui ◽  
Svetlana Kilina ◽  
Wenfang Sun
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Triplet Excited State ◽  
532 Nm

Dinuclear Ir(iii) complexes tethered by fluorenyl motif exhibited weak 1,3MLCT/1,3LLCT absorption at >500 nm, dual phosphorescence, broad triplet excited-state absorption, and reverse saturable absorption at 532 nm.

Heteroleptic cationic iridium(iii) complexes bearing phenanthroline derivatives with extended π-conjugation as potential broadband reverse saturable absorbers

2020 ◽  
Vol 44 (2) ◽  
pp. 456-465 ◽  
Author(s):  
Li Wang ◽  
Peng Cui ◽  
Levi Lystrom ◽  
Jiapeng Lu ◽  
Svetlana Kilina ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Saturable Absorbers ◽  
Near Ir ◽  
Diimine Ligand ◽  
532 Nm

Fluorenyl substitution at the diimine ligand broadened the excited-state absorption to near-IR, and enhanced reverse saturable absorption at 532 nm for the cationic Ir(iii) complexes.

Extending the Bandwidth of Reverse Saturable Absorption in Platinum Complexes Using Two-Photon-Initiated Excited-State Absorption

2013 ◽  
Vol 5 (3) ◽  
pp. 565-572 ◽  
Author(s):  
Bingguang Zhang ◽  
Yunjing Li ◽  
Rui Liu ◽  
Timothy M. Pritchett ◽  
Joy E. Haley ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Platinum Complexes ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Two Photon

The high-order optical nonlinearity of 2,11,20,29-tetrabromo-2,3-naphthalocyanine iron

2018 ◽  
Vol 22 (09n10) ◽  
pp. 863-867
Author(s):  
Wang Zhang ◽  
Chunying He ◽  
Lining Zhang ◽  
Li Jiang ◽  
Yijun Yuan ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Ground State ◽  
Nonlinear Refraction ◽  
Optical Nonlinearity ◽  
High Order ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Triplet Excited State ◽  
First Excited State

A novel naphthalocyanine 2,11,20,29-tetrabromo-2,3-naphthalocyanine iron was synthetized. Its optical nonlinearity was investigated using the Z-scan technique. Reverse saturable absorption and high-order optical nonlinear refraction were detected. The absorption cross sections of the ground state, the singlet first excited state and the triplet first excited state were fitted to be 3.2 × 10[Formula: see text] cm[Formula: see text], 6.2 × 10[Formula: see text] cm[Formula: see text] and 4.6 × 10[Formula: see text] cm[Formula: see text], respectively. Fits also gave 1.17 × 10[Formula: see text] cm[Formula: see text] for the refractive volume of the ground state, 0.6 for the ratio of the refractive volume of the singlet first excited state to the ground state and 2.7 for the ratio of refractive volume of the first triplet excited state to the ground state.

NONLINEAR OPTICAL RESPONSE AND REVERSE SATURABLE ABSORPTION OF RARE EARTH PHTHALOCYANINE IN DMF SOLUTION

2003 ◽  
Vol 12 (03) ◽  
pp. 367-376 ◽  
Author(s):  
G. A. KUMAR
Keyword(s):  
Rare Earth ◽  
Excited State ◽  
Cross Sections ◽  
Nonlinear Optical ◽  
Excited State Absorption ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Absorption Cross

Nonlinear optical response and reverse saturable absorption behavior of various rare earth phthalocyanines such as Nd , Eu , Sm and La in dimethyl formamide (DMF) solution were studied under high power Nd:YAG laser excitation. Excited state absorption cross-sections and two-photon absorption cross-sections of these systems are measured from the limiting characteristics. The SmHPc 2 system yields maximum value for excited state absorption cross-section and its potential application in DMF as a suitable optical limiter is also discussed.

Polymer Materials Design for Optical Limiting

1997 ◽  
Vol 479 ◽  
Author(s):  
B. H. Cumpston ◽  
K. Mansour ◽  
A. A. Heikal ◽  
J. W. Perry
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Polymeric Materials ◽  
Optical Limiting ◽  
Polymer Materials ◽  
Homogeneous Distribution ◽  
Saturable Absorption ◽  
Nanosecond Laser ◽  
Reverse Saturable Absorption ◽  
Discrete Elements

AbstractPhthalocyanines (PC's) containing heavy metal central atoms have recently been recognized as leading candidates for reverse saturable absorption and optical limiting (OL) applications in the visible spectrum. Strong triplet excited state absorption brought about by a large intersystem crossing rate is responsible for the excellent limiting performance of these molecules. Moreover, devices which maximize the excited state population along the light path will demonstrate maximum limiting efficiency. A non-homogeneous distribution of indium tetra(tert-butyl) phthalocyanine chloride (InC1PC) has been shown to be very effective in attenuating 532 nm nanosecond laser pulses. This was accomplished by approximating a hyperbolic distribution of chromophores using discrete elements of fixed dye concentration. Greater OL should be achieved by fabricating materials containing a continuous concentration gradient of chromophore. This paper focuses on issues concerning the preparation of solid polymeric materials that contain such a chromophore gradient. This design is achieved by diffusing chromophore-containing solutions into partially polymerized poly(methyl methacrylate) (PMMA).

Dynamic saturable optical nonlinearities in free base tetrapyridylporphyrin

2003 ◽  
Vol 07 (06) ◽  
pp. 452-456 ◽  
Author(s):  
Newton M. Barbosa Neto ◽  
Leonardo De Boni ◽  
José J. Rodrigues ◽  
Lino Misoguti ◽  
Cléber R. Mendonça ◽  
...  
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Optical Nonlinearities ◽  
Free Base ◽  
Photophysical Parameters ◽  
Crossing Time ◽  
532 Nm

Dynamic optical nonlinearities in free base tetrapyridylporphyrin ( H 2 TPyP ) solutions were investigated at 532 nm with the Z-scan technique. We observed a reverse saturable absorption process that was found to have a fast contribution related to the singlet population and a slow accumulative contribution arising from the triplet population. The optical excitations and subsequent relaxations can be interpreted with a five-energy-level diagram that allows determination of the excited states photophysical parameters such as triplet and singlet absorption cross-sections and the intersystem crossing time.

Excited state absorption and decay kinetics of near IR polymethine dyes

2008 ◽  
Vol 352 (1-3) ◽  
pp. 97-105 ◽  
Author(s):  
Lazaro A. Padilha ◽  
Scott Webster ◽  
Honghua Hu ◽  
Olga V. Przhonska ◽  
David J. Hagan ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Polymethine Dyes ◽  
Decay Kinetics ◽  
Near Ir ◽  
Kinetics Of

Thermal Donor Removal by Rapid Thermal Annealing: Infrared Absorption

1985 ◽  
Vol 46 ◽  
Author(s):  
Herman J. Stein ◽  
S. K. Hahn ◽  
S. C. Shatas
Keyword(s):  
Excited State ◽  
High Temperature ◽  
Excited States ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Infrared Absorption ◽  
Excited State Absorption ◽  
Thermal Donor ◽  
Oxygen Cluster ◽  
Oxygen Precipitates

AbstractRapid thermal annealing of thermal donors in Si with 10 sec anneal times at temperatures between 600 and 1000 °C has been investigated by infrared absorption at 80 K. Thermal donors A through D, which are identified by excited state absorption, are present in as-grown Czochralski Si; whereas excited states for donors A through F as well as photoionization of thermal donors are observed after extended heating at 450 °C. The temperature required for rapid thermal annealing is lower when only donors A through D are present. Removal of thermal donors A through F by rapid thermal annealing at temperatures > 800°C restores 7 to 8 oxygen atoms to interstitial sites per electricallӯ measured donor removed. This ratio supports oxygen cluster models for thermal donors but does not support previous suggestions that such clusters are embryonic forms of high temperature oxygen precipitates.

Sign in / Sign up

Export Citation Format

Share Document