Just need help with number 3, thank you! ice Upconver × Course Documents-2181 |
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Just need help with number 3, thank you!
ice Upconver × Course Documents-2181 | G what is nir imaginging-Go | Course bes webdav pid-446709 7-dt content-rid-1 77507921 courses 21 gi ioan nuorescence%20Upconversions 2020 For each chemical equation, write the rate law. Example ratekm sinRu(bn).1 the upconversion process You calculated the bimolecular rate constant using a Stern-Volmer analysis. To which rate c. By invok ettet visualized when using a green laser as opposeu to u d. constant trom this probleu 3. There is another, different excited state of [Ru(bpy) that can be accessed from the triplet excited state. What is the nature of the state? Le. where is the excited electron? of light absorb ule. An emission quantum yield, therefo is the mnumber of photons vided by the numb photons absorbed it can (be defined as the ratio of the e constant to the sum oft e and i tre rate constants (d: k / (k + um of the emissive and non-radiative rate k)). The emissive lifetime (t) is the recipro constants. Therefore, the rate constants can becuad as follows ke = (1-4) ntum yield for emission Given a = 0.029 (2- given in the lab, calcuek and kr for the emission of [Rubp a py)P) and the lifetme b. Which rate consta from Question 2 do these correspond to? c How do the rat constants k and ke compare to each other? What won d the quantum yield be if they yre equal? d. How do hese rate constants compare to the bimolecular rate constant calculan the lab? process has the fastest rate constant? Why will the bimolecular collision rate vary th concentration? 1 F10 F11F12PrtScrInser F6 F7 F8 F9 1Explanation / Answer
3. Nature of state is always Excited state.
[Ru(bpy)3]2+ is an octahedral coordination complex. The complex is chiral, with D3 symmetry. It has been resolved into its enantiomers, which are kinetically stable. In excited state the molecule loses symmetry and attains C2symmetry, as the transferred electron doesn't distribute symmetrically to the 3 bipyridyl ligands in the lowest lying triplet excited state.
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