New NIR-emitting complexes of platinum(II) and palladium(II) with fluorinated benzoporphyrins

Borisov, Sergey M.; Nuss, Gernot; Haas, Wernfried; Saf, Robert; Schmuck, Martin; Klimant, Ingo

doi:10.1016/j.jphotochem.2008.10.003

Cited by 125 publications

(157 citation statements)

References 38 publications

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“…The synthesis of this luminophore and its photophysical properties are described in detail elsewhere (Borisov et al , b, 2009). PtTPTBPF has a higher brightness (defined as the product of the molar absorption coefficient, e, and the emission quantum yield) and a higher photostability as compared to other platinum(II) and palladium(II) benzoporphyrin complexes (Borisov et al 2009). An advantageous feature of PtTPTBPF is the possibility to excite the indicator with low energetic red light (ex.…”

Section: Sensor Materialsmentioning

confidence: 99%

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Imaging of surface O2 dynamics in corals with magnetic micro optode particles

et al. 2012

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We present a new method for quantifying spatio-temporal O 2 distribution and dynamics at biologically active surfaces with a complex surface topography. Magnetized O 2 optode microparticles (*80-100 lm) containing the NIR-emitting luminophore platinum (II) meso-tetra (4-fluorophenyl) tetrabenzoporphyrin (PtTPTBPF; ex. max. 615 nm; em. max. 780 nm) were distributed across the surface tissue of the scleractinian coral Caulastrea furcata and were held in place with a strong magnet. The O 2 -dependent luminescence of the particles was mapped with a lifetime imaging system enabling measurements of the lateral surface heterogeneity of the O 2 microenvironment across coral polyps exposed to flow. Mapping steady-state O 2 concentrations under constant light and O 2 dynamics during experimental light-dark shifts enabled us to identify zones of different photosynthetic activities within a single coral polyp linked to the distribution of coral host pigments. Measurements under increasing irradiance showed typical saturation curves of O 2 concentration and estimates of gross photosynthesis that could be spatially resolved at *100 lm pixel resolution. The new method for O 2 imaging with magnetized optode particles has much potential to be used in studies of the surface microenvironment of other aquatic systems such as sediments, biofilms, plant, and animal tissue.

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Section: Sensor Materialsmentioning

confidence: 99%

“…A weight of 15 mg of PtTPTBPF (prepared according to Borisov et al 2009) and 1 g of PS-MA (EF-80, kindly provided by Sartomer Inc; http://www.sartomereurope.com) were dissolved in 3 g of chloroform. The solution was evaporated in a Petri dish, and the resulting bulk material was ground in an agate mortar.…”

Section: Preparation Of O 2 -Sensitive Microparticlesmentioning

confidence: 99%

Imaging of surface O2 dynamics in corals with magnetic micro optode particles

et al. 2012

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“…Sensitizer Synthesis : All light-harvesting chormophores (PdDBA [ 42 ] ; PtTPTBPF and PdTPTBPF [ 43 ] ; Pt1N, Pt2N, and Pt3N [ 44 ] were prepared according to previously published procedures.…”

Section: Methodsmentioning

confidence: 99%

Efficient Broadband Triplet–Triplet Annihilation‐Assisted Photon Upconversion at Subsolar Irradiance in Fully Organic Systems

Monguzzi

Borisov

Pedrini

et al. 2015

Adv Funct Materials

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The latest trend in solar cell technology is to develop photon managing processes that adapt the solar emission to the spectral range at which the devices show the largest intrinsic effi ciency. Triplet-triplet annihilationassisted photon upconversion (sTTA-UC) is currently the most promising process to blue-shift sub-bandgap photons at solar irradiance, even if the narrow absorption band of the employed chromophores limits its application. In this work, we demonstrate how to obtain broadband sTTA-UC at sub-solar irradiance, by enhancing the system's light-harvesting ability by way of an ad-hoc synthesized family of chromophores with complementary absorption properties. The overall absorptance is boosted, thus doubling the number of upconverted photons and signifi cantly reducing the irradiance required to achieve the maximum upconversion yield. An outstanding yield of ≈10% is obtained under broadband air mass (AM) 1.5 conditions, which allows a DSSC device to operate by exploiting exclusively sub-bandgap photons.

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“…Excitation in the red part of the spectrum is strongly preferred not only because it allows sensing in highly scattering media and in tissue but also because it can be combined with cheaper optical components; for example, the sensitivity of cheap and compact Si photodiodes increases at wavelengths longer than 600 nm and reaches a maximum at 850-900 nm [27]. For these reasons, red-excitable and NIRemitting indicators are becoming increasingly popular for the development of optical oxygen sensors to be used in marine sediments, in blood, in cells, or in tissues.…”

Section: Metalloporphyrinsmentioning

confidence: 99%

“…PtTPTBPF 42 and PdTPTBPF 43 (Fig. 8) are obtained by substitution of the hydrogen to fluorine in the meso-phenyl rings, which slightly improves the luminescence quantum yield of both Pt(II) and Pd(II) complexes (Table 3) and enhances their photostability [27].…”

Section: Metalloporphyrinsmentioning

confidence: 99%

Indicators for optical oxygen sensors

Borisov¹,

Quaranta²,

Klimant³

2012

Advances in Chemical Bioanalysis

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Continuous monitoring of oxygen concentration is of great importance in many different areas of research which range from medical applications to food packaging. In the last three decades, significant progress has been made in the field of optical sensing technology and this review will highlight the one inherent to the development of oxygen indicators. The first section outlines the bioanalytical fields in which optical oxygen sensors have been applied. The second section gives the reader a comprehensive summary of the existing oxygen indicators with a critical highlight on their photophysical and sensing properties. Altogether, this review is meant to give the potential user a guide to select the most suitable oxygen indicator for the particular application of interest.

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New NIR-emitting complexes of platinum(II) and palladium(II) with fluorinated benzoporphyrins

Cited by 125 publications

References 38 publications

Imaging of surface O2 dynamics in corals with magnetic micro optode particles

Imaging of surface O2 dynamics in corals with magnetic micro optode particles

Efficient Broadband Triplet–Triplet Annihilation‐Assisted Photon Upconversion at Subsolar Irradiance in Fully Organic Systems

Indicators for optical oxygen sensors

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