Unlock Exclusive Discounts & Flash Sales! Click Here to Join the Deals on Every Wednesday!

0
Inquiry Basket

There is no product in the shopping cart.

Study of heavy carbenes (silylenes, germylenes and stannylenes) by Flash Photolysis (CAT#: STEM-ST-0306-WXH)

Introduction

A carbene is a divalent carbon atom with two electrons that are not shared with any other atoms. The carbene is called a singlet carbene when the two electrons have opposite spins, and a triplet carbene when they have parallel spins.<br />Silylene is a chemical compound with the formula SiH2. It is the silicon analog of methylene, the simplest carbene. Silylene is a stable molecule as a gas but rapidly reacts in a bimolecular manner when condensed. <br />Germylenes are a class of germanium(II) compounds with the general formula :GeR2. They are heavier carbene analogs.<br />Stannylenes (R2Sn:) are a class of organotin(II) compounds that are analogues of carbene.

Add to Cart Please Inquire


Principle Applications Procedure Materials Notes Related Products

Principle

Flash photolysis is a pump-probe laboratory technique, in which a sample is first excited by a strong pulse of light from a pulsed laser of nanosecond, picosecond, or femtosecond pulse width or by another short-pulse light source such as a flash lamp. This first strong pulse is called the pump pulse and starts a chemical reaction or leads to an increased population for energy levels other than the ground state within a sample of atoms or molecules. Typically the absorption of light by the sample is recorded within short time intervals (by a so-called test or probe pulses) to monitor relaxation or reaction processes initiated by the pump pulse.

Applications

Used to study light-induced processes in organic molecules, polymers, nanoparticles, semiconductors, photosynthesis in plants, signaling, and light-induced conformational changes in biological systems.

Procedure

The process of laser flash photolysis can be divided into three steps: absorption, excitation and decomposition.
First, when the laser beam hits the surface of the material, the photons will be absorbed by the material, making the material molecules or atoms in an excited state.
Then, the material molecules or atoms in the excited state will transition to a lower energy level state through spontaneous emission or excitation by external photons.
Finally, the molecules or atoms of matter will release energy during the transition process, which will break down into smaller molecules or atoms.

Materials

Flash Photolysis Spectrometer
Privacy Policy | Cookie Policy | Copyright © 2024 STEMart. All Rights Reserved.