A double bond-conjugated dimethylnitrobenzene-type photolabile nitric oxide donor with improved two-photon cross section.

Photocontrollable NO donors enable precise spatiotemporal release of NO under physiological conditions. We designed and synthesized a novel dimethylnitrobenzene-type NO donor, Flu-DNB-DB, which contains a carbon-carbon double bond in place of the amide bond of previously reported Flu-DNB. Flu-DNB-DB releases NO in response to one-photon activation in the blue wavelength region, and shows a greatly increased two-photon cross-section (δu) at 720 nm (Flu-DNB: 0.

Visible light-induced nitric oxide release from a novel nitrobenzene derivative cross-conjugated with a coumarin fluorophore.

Nitric oxide (NO) is a well-known free-radical molecule which is endogenously biosynthesised and shows various functions in mammals. To investigate NO functions, photocontrollable NO donors, compounds which release NO in response to light, are expected to be potentially useful. However, most of the conventional NO donors require harmful ultra-violet light for NO release.

Fine spatiotemporal control of nitric oxide release by infrared pulse-laser irradiation of a photolabile donor.

Two-photon-excitation release of nitric oxide (NO) from our recently synthesized photolabile NO donor, Flu-DNB, was confirmed to allow fine spatial and temporal control of NO release at the subcellular level in vitro. We then evaluated in vivo applications. Femtosecond near-infrared pulse laser irradiation of predefined regions of interest in living mouse brain treated with Flu-DNB induced NO-release-dependent, transient vasodilation specifically at the irradiated site.

[Nitric oxide donors activated by two-photon excitation].

Nitric oxide (NO) is a key molecule in blood pressure regulation, neuromodulation, and biodefense. Since it is an unstable gas under ambient conditions, various NO donors have been developed and employed for biological studies as an alternative to direct NO application. However, many of them release NO via spontaneous decomposition, so that it is difficult to control the NO release.

Multiple bond-conjugated photoinduced nitric oxide releaser working with two-photon excitation.

Four novel nitric oxide (NO) releasers working via two-photon excitation (TPE), based on an acceptor-donor-acceptor (A-D-A) molecular design, were synthesized. Their decomposition and NO release in response to one-photon excitation, and their decomposition in response to two-photon excitation were examined. Their photoinduced decomposition characteristics are discussed.

Photoinduced nitric oxide release from a hindered nitrobenzene derivative by two-photon excitation.

Here, we demonstrated photoinduced NO generation from a 2,6-dimethylnitrobenzene-based compound (Flu-DNB) via a two-photon excitation (TPE) process. After pulse laser irradiation to a solution of Flu-DNB, oxidation products of NO were observed. This is the first account of a non-nitrosyl-chelated metal ion containing NO donor which can be controlled by the TPE technique.