pH dependent one-/two-photon fluorescence emission properties and mechanism of the dendrimer PAMAM triphenylamine imine

An unsymmetrical phthalocyanine based one- and two-photon fluorescence imaging probe that substituted with 4-tert-butylphenoxy and RDGyK moieties was developed and characterized by UV-vis and high-resolution MALDI-TOF/MS. The conjugate is non-aggregated in [Formula: see text],[Formula: see text]-dimethylformamide, with relatively weak fluorescence emission ([Formula: see text] 0.023) and high singlet oxygen quantum yield ([Formula: see text] 0.55). Conjugation of the cyclic peptide sequence c(RGDyK) can enhance the cellular uptake towards the DU145 and PC3 cells. While the fluorescence is greatly enhanced in mitochondria, the conjugate is non-cytotoxicity either in dark or upon exposure to red-light with dose up to 12 J.cm[Formula: see text]. The results suggest that this conjugate is a promising multifunctional imaging probe for mitochondria and cancer.

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Nonlinear optical property and ultrafast response of a two-photon photopolymerization initiator based on dibenzothiophene

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863517500485 ◽

2017 ◽

Vol 26 (04) ◽

pp. 1750048 ◽

Cited By ~ 7

Author(s):

Yaochuan Wang ◽

Dajun Liu ◽

Yizhuo Wang ◽

Guiqiu Wang ◽

Xiaoqiang Yu

Keyword(s):

Cross Section ◽

Fluorescence Emission ◽

Photon Absorption ◽

Time Resolved ◽

Pump Probe ◽

Two Photon Absorption ◽

Two Photon ◽

Uv Visible ◽

Two Photon Fluorescence ◽

Photon Fluorescence

A dibenzothiophene-based two-photon photopolymerization (TPP) initiator named E,E-1,4-bis[3-vinyl-dibenzothiophene]-2,5-dimethoxybenzene (VBPMOB) with intense two-photon fluorescence (TPF) was investigated by UV–visible, fluorescence, pump–probe and time-resolved fluorescence spectroscopies. The maximum two-photon absorption (TPA) cross-section of VBPMOB in DMF was determined to be 274[Formula: see text]GM. In addition, the TPA cross-section at 800[Formula: see text]nm was 230[Formula: see text]GM, which is the most commonly used wavelength for TPP. The ultrafast spectra result indicated that after excitation, the VBPMOB molecule will first undergo a fast internal conversion process to form an intramolecular charge transfer (ICT) state with a certain width followed by relaxation of the ICT state with fluorescence emission.

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Avalanche photodiode detection with object scanning and image restoration provides 2–4 fold resolution increase in two‐photon fluorescence microscopy

Bioimaging ◽

10.1002/1361-6374(199609)4:3<187::aid-bio9>3.3.co;2-v ◽

1996 ◽

Vol 4 (3) ◽

pp. 187-197 ◽

Cited By ~ 21

Author(s):

Hiroshi Kano ◽

Hans T M van der Voort ◽

Martin Schrader ◽

Geert M P van Kempen ◽

Stefan W Hell

Keyword(s):

Fluorescence Microscopy ◽

Image Restoration ◽

Avalanche Photodiode ◽

Two Photon ◽

Two Photon Fluorescence ◽

Photon Fluorescence

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Lysosomal targeted NIR photosensitizer for photodynamic therapy and two-photon fluorescent imaging

Journal of Materials Chemistry B ◽

10.1039/d0tb02692a ◽

2021 ◽

Author(s):

Ruiyuan Liu ◽

Yuping Zhou ◽

Di Zhang ◽

Genghan He ◽

Chuang Liu ◽

...

Keyword(s):

Photodynamic Therapy ◽

Fluorescence Imaging ◽

Near Infrared ◽

Fluorescent Imaging ◽

High Fidelity ◽

Design And Synthesis ◽

Two Photon ◽

Two Photon Fluorescence ◽

Photon Fluorescence

Design and synthesis of near-infrared (NIR) emissive fluorophore for imaging of organelle and photodynamic therapy has received enormous attention. Hence, NIR emissive fluorophore of high-fidelity lysosome targeting, two-photon fluorescence imaging,...

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