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Coordination polymers show great potential for the tailored design of advanced photonic applications by employing crystal chemistry concepts. One challenge for achieving a rational design of nonlinear optically active MOF materials is deriving fundamental structure-property relations of the interplay between the photonic properties and the spatial arrangements of optically active chromophores within the network. We here investigate two-photon-absorption (TPA)-induced photoluminescence of two new MOFs based on a donor-acceptor tetraphenylphenylenediamine (tPPD) chromophore linker (HTPBD) and Zn(II) and Cd(II) as metal centers. The TPA efficiencies are controlled by the network topologies, degree of interpenetration, packing densities, and the specific spatial arrangement of the chromophores. The effects can be rationalized within the framework of established excited-state theories of molecular crystals. The results presented here demonstrate the key effect of chromophore orientation on the nonlinear optical properties of crystalline network compounds and allow for establishing quantitative design principles for efficient TPA materials.
This article was published in the following journal.
Name: Journal of the American Chemical Society
We have developed a caged neurotransmitter using an extended π-electron chromophore for efficient multiphoton uncaging on living neurons. Widely studied in a chemical context, such chromophores are i...
The sensitivity and selectivity properties of three phenylquinoxaline derivatives to different metal ions were investigated by absorption and fluorescence spectroscopy. The absorption and fluorescence...
We propose and investigate a wide-angle and high-efficiency absorber by using the void plasmon (VP) effect in a Fabry-Perot (FP)-like system, which consists of a perforated metal film and a ground met...
Long persistent luminescence (LPL) materials have unique photophysical mechanism to store light radiation energy for subsequent release. However, in comparison to the common UV source, white-light (WL...
In this work, chemosensors based on mixed ligands were proposed for the cooperative detection of Co. The relationship between the specifically selected mixed organic ligands and the detection activiti...
Adult patients presenting to the emergency department with superficial cutaneous abscesses will be randomized after incision and drainage to standard care with wound packing or no packing ...
The aim of this trial is to compare internal wound packing to no packing in postoperative management following incision and drainage of perianal abscess. Participants will be randomised 1:...
The goal of this study is to examine patients undergoing incision and drainage of cutaneous abscesses to determine if routine packing of the abscess cavity affects the need for further int...
Vaginal packing is used routinely following vaginal reconstructive surgery, however, no recommendation regarding vaginal packing after laparoscopic sacrocolpopexy exists. Despite little da...
In this study, test persons with chronic excessive UV radiation and a control group are examined by multiphoton laser imaging and biophysical methods in order to evaluate the dermal fiber ...
Porphyrins which are combined with a metal ion. The metal is bound equally to all four nitrogen atoms of the pyrrole rings. They possess characteristic absorption spectra which can be utilized for identification or quantitative estimation of porphyrins and porphyrin-bound compounds.
Fluorescence microscopy utilizing multiple low-energy photons to produce the excitation event of the fluorophore. Multiphoton microscopes have a simplified optical path in the emission side due to the lack of an emission pinhole, which is necessary with normal confocal microscopes. Ultimately this allows spatial isolation of the excitation event, enabling deeper imaging into optically thick tissue, while restricting photobleaching and phototoxicity to the area being imaged.
Supramolecular networks that consist of ordered arrangements of organic electron donor linkers (usually ditopic or polytopic organic carboxylates) and metal cations. They can have an extremely high surface area and adjustable pore size that allows for the insertion of other molecules capable of various functions such as catalysis, capture of carbon dioxide, and drug delivery.
The total amount of a chemical, metal or radioactive substance present at any time after absorption in the body of man or animal.
Light-induced change in a chromophore, resulting in the loss of its absorption of light of a particular wave length. The photon energy causes a conformational change in the photoreceptor proteins affecting PHOTOTRANSDUCTION. This occurs naturally in the retina (ADAPTATION, OCULAR) on long exposure to bright light. Photobleaching presents problems when occurring in PHOTODYNAMIC THERAPY, and in FLUORESCENCE MICROSCOPY. On the other hand, this phenomenon is exploited in the technique, FLUORESCENCE RECOVERY AFTER PHOTOBLEACHING, allowing measurement of the movements of proteins and LIPIDS in the CELL MEMBRANE.