scholarly journals Importance of double-resonance effects in two-photon absorption properties of Au25(SR)18−

2017 ◽  
Vol 8 (6) ◽  
pp. 4595-4601 ◽  
Author(s):  
Zhongwei Hu ◽  
Lasse Jensen
Keyword(s):  
Cross Sections ◽  
Double Resonance ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Absorption Properties ◽  
Resonance Effects ◽  
Two Photon Absorption ◽  
Two Photon

We show that double-resonance effects for Au25(SR)18− are less pronounced and do not lead to significantly enhanced two-photon absorption cross-sections.

scholarly journals Impact of the Subunit Arrangement on the Nonlinear Absorption Properties of Organometallic Complexes with Ruthenium(II) σ-Acetylide and Benzothiadiazole as Building Units §

Inorganics ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 67
Author(s):  
Eleonora Garoni ◽  
Alessia Colombo ◽  
Kenji Kamada ◽  
Claudia Dragonetti ◽  
Dominique Roberto
Keyword(s):  
Electron Acceptor ◽  
Cross Sections ◽  
Nonlinear Absorption ◽  
Organometallic Complexes ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Resonance Enhancement

In this paper, the nonlinear absorption properties of two complexes consisting of Ru(C≡CPh)(C≡C)(dppe)2 (dppe = Ph2PCH2CH2PPh2) as electron donor (D) and 4,7-di(2-thienyl)benzo[c][1,2,5]thiadiazole as electron acceptor (A) units in two different arrangement, i.e., A–D–A and D–A–D, are presented. They were measured in solution by the femtosecond open-aperture Z-scan method. The complexes show moderate two-photon absorption cross-sections σ(2) of several hundred to one thousand GM (here 1 GM = 10−50 cm4 s molecule−1 photon−1). Although they are formed by the same building units, it was found that the two-photon absorption values of the D–A–D arrangement are six times higher than that of the A–D–A one. This difference can be explained by the number of metal cores (one or two ruthenium centers), the geometrical configurations of the complexes (more or less planar), and the resonance enhancement by lowering the intermediate state.

Two-photon absorption properties of BODIPY-like compounds based on BF2–naphthyridine complexes

2019 ◽  
Vol 21 (12) ◽  
pp. 6662-6671 ◽  
Author(s):  
Jessica Dipold ◽  
Eduardo E. Romero ◽  
Julie Donnelly ◽  
Tainara P. Calheiro ◽  
Helio G. Bonacorso ◽  
...  
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon

High two-photon absorption cross-sections of BODIPY-like compounds were obtained for simple structures.

Novel 2,1,3-Benzothiadiazole-Based Red-Fluorescent Dyes with Enhanced Two-Photon Absorption Cross-Sections

2006 ◽  
Vol 12 (8) ◽  
pp. 2303-2317 ◽  
Author(s):  
Shin-ichiro Kato ◽  
Taisuke Matsumoto ◽  
Motoyuki Shigeiwa ◽  
Hideki Gorohmaru ◽  
Shuuichi Maeda ◽  
...  
Keyword(s):  
Cross Sections ◽  
Fluorescent Dyes ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon

A small-molecule with a large two-photon absorption cross-section serves as a membrane-permeable ribonucleic acid (RNA) probe for live cell imaging

2018 ◽  
Vol 42 (17) ◽  
pp. 14325-14331 ◽  
Author(s):  
Ruiqing Feng ◽  
Longlong Li ◽  
Bing Li ◽  
Jinhui Li ◽  
Dan Peng ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Live Cell Imaging ◽  
Plasma Membranes ◽  
Cell Imaging ◽  
Photon Absorption ◽  
Absorption Cross ◽  
High Permeability ◽  
Two Photon Absorption ◽  
Two Photon

DMI could light up the RNA of the nucleus and the cytoplasm in living systems, which not only exhibits larger two-photon absorption cross-sections (981 GM), but also displays high-permeability to plasma membranes of vigorous cells.

scholarly journals Two-photon Absorption Cross Sections of Phthalocyanine Nanoparticles

2008 ◽  
Vol 33 (4) ◽  
pp. 931-934 ◽  
Author(s):  
K. Takemura ◽  
K. Kasatani ◽  
Y. Morita ◽  
H. Okamoto, ◽  
J. Kawamata
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon

Thiophene-based pyridine derivatives: synthesis, crystal structures, two-photon absorption properties and bio-imaging applications in the near-IR region

2016 ◽  
Vol 40 (10) ◽  
pp. 8809-8814 ◽  
Author(s):  
Shasha Xu ◽  
Yingzhong Zhu ◽  
Rui Li ◽  
Jian Su ◽  
Shengli Li ◽  
...  
Keyword(s):  
Cross Sections ◽  
High Stability ◽  
Photon Absorption ◽  
Pyridine Derivatives ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Near Ir ◽  
Bio Imaging ◽  
Low Cytotoxicity

Two novel D–π–A structural chromophores showing large 2PA active cross-sections, low cytotoxicity and high stability in near-IR bio-imaging.

Syntheses and nonlinear absorption properties of conjugated porphyrin supramolecules

2007 ◽  
Vol 11 (05) ◽  
pp. 359-367 ◽  
Author(s):  
Kazuya Ogawa ◽  
Chihiro Hara ◽  
Yoshiaki Kobuke
Keyword(s):  
Cross Section ◽  
Communication System ◽  
Absorption Cross Section ◽  
Enhancement Factor ◽  
Electronic Communication ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon

Self-assemblies consisting of acetylene-linked bisporphyrins with a 4-nitrophenylethynyl substituent and with a phenylethynyl substituent were synthesized. The Q-band of the phenylethynyl-substituted compound appears at 762 nm whereas that of the 4-nitrophenylethynyl-substituted one was red-shifted to 784 nm and intensified. This may be attributed to the participation of the nitro group in the π-electronic communication system. HOMOs and LUMOs were calculated for these compounds using an INDO/S-CI method. The effective two-photon absorption cross-section values of these self-assemblies were measured by using a nanosecond open aperture Z-scan method. The maximum effective two-photon absorption cross-section values of 4-nitrophenylethynyl- and phenylethynyl-substituted bisporphyrins were obtained as 1.2 × 105 GM and 8.1 × 104 GM , respectively, at 890 nm. A 1.5 enhancement factor was obtained by introducing nitro groups, which was similar to the value previously reported for ferrocene- and fullerene-connected supramolecular porphyrin.

Strategy towards large two-photon absorption cross-sections for diketopyrrolopyrroles

2015 ◽  
Vol 3 (4) ◽  
pp. 742-749 ◽  
Author(s):  
Anna Purc ◽  
Krzysztof Sobczyk ◽  
Yusuke Sakagami ◽  
Akihiro Ando ◽  
Kenji Kamada ◽  
...  
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor

Decorating diketopyrrolopyrroles with strongly electron-rich heterocycles led to donor–acceptor–donor architectures possessing two-photon brightness 850–1900 GM.

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