{"product_id":"photoinduced-intramolecular-charge-transfer-in-donor-acceptor-biaryls-and-resulting-applicational-aspects-regarding-fluorescent-probes-and-solar-energ-paperback","title":"Photoinduced Intramolecular Charge Transfer in Donor-Acceptor Biaryls and Resulting Applicational Aspects Regarding Fluorescent Probes and Solar Energ - Paperback","description":"\u003cdiv\u003e\u003cp style=\"text-align: right;\"\u003e\u003ca href=\"https:\/\/reportcopyrightinfringement.com\/\" target=\"_blank\" rel=\"nofollow\"\u003e\u003cb\u003eReport copyright infringement\u003c\/b\u003e\u003c\/a\u003e\u003c\/p\u003e\u003c\/div\u003e\u003cp\u003eby \u003cb\u003eMichael Maus\u003c\/b\u003e (Author)\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003eThis study is focused on the effects of photoinduced intramolecular charge transfer (CT) in three differently twisted donor-acceptor (D-A) biphenyls. Taking into account a further pair of differently twisted D-A biaryls new universal insights into the photoinduced electronic and conformation dynamics of D-A biaryls are obtained. Furthermore, possible applications in fields of solar energy conversion and fluorescence sensing of microenvironments are demonstrated.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eExperimental means of stationary and time-resolved (ps to s) luminescence, transient absorption (sub-ps), polarization spectroscopy, high pressure and low temperature techniques are employed in conjunction with quantum chemical calculations.\u003c\/p\u003e\u003cp\u003eTwist angle and solvent dependent electron transfer (ET) interactions between the D and A aryl moieties are responsible for the low lying and solvatochromic intramolecular CT electron band which gains unusually high intensity through strong electronic coupling of the pure \u003csup\u003e1\u003c\/sup\u003eET with the ground (S\u003csub\u003e0\u003c\/sub\u003e) and \u003csup\u003e1\u003c\/sup\u003eL\u003csub\u003ea\u003c\/sub\u003e state. As regards the class of biaryl compounds, for the first time, an excited state electron transfer from the D to the A could be monitored by dual spectrally separated stimulated fluorescence bands with precursor-successor relationship on a sub-ps timescale for the D-A biphenyls. It is concluded that, in additon to the electronic interaction of \u003csup\u003e1\u003c\/sup\u003eET with S\u003csub\u003e0\u003c\/sub\u003e and \u003csup\u003e1\u003c\/sup\u003eL\u003csub\u003ea\u003c\/sub\u003e, the electronic interaction with a close lying \u003csup\u003e1\u003c\/sup\u003eL\u003csub\u003eb\u003c\/sub\u003e state plays a fundamental role in the ET dynamics and the \u003csup\u003e1\u003c\/sup\u003eCT-S\u003csub\u003e0\u003c\/sub\u003e transition probability in D-A biaryls.\u003c\/p\u003e\u003cp\u003eThe initial photoinduced conformational relaxation occurs towards planarity in all biaryls investigated. However, various results evidence that the highly twisted D-A biphenyl additionally performs a slow \"excited state intramolecular back twist rotation\" leading to a solvent polarity dependent conformational equilibrium between a more planar (\u003cstrong\u003eCT\u003c\/strong\u003e) and a more twisted (\u003cstrong\u003eCTR\u003c\/strong\u003e) conformer in S\u003csub\u003e1\u003c\/sub\u003e(\u003csup\u003e1\u003c\/sup\u003eCT). Using global analysis of the biexponential fluorescence decays as a function of temperature and pressure in medium polar solvents, the kinetics, thermodynamics, viscosity control and decomposed emission spectra associated with this adiabatic photoreaction are determined.\u003c\/p\u003e\u003cp\u003eThe twist angle dependent ability of the D-A biphenyls to serve as fluorescent probes of micropolarity, changes of microviscosity or matrix order, protic solvents and pH is investigated. In particular, fluorescence sensing of pH seems to be promising.\u003c\/p\u003e\n            \u003cdiv\u003e\n\u003cstrong\u003eNumber of Pages:\u003c\/strong\u003e 224\u003c\/div\u003e\n            \u003cdiv\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.51 x 8.5 x 5.5 IN\u003c\/div\u003e\n            \u003cdiv\u003e\n\u003cstrong\u003eIllustrated:\u003c\/strong\u003e Yes\u003c\/div\u003e\n            \u003cdiv\u003e\n\u003cstrong\u003ePublication Date:\u003c\/strong\u003e October 01, 1998\u003c\/div\u003e\n            ","brand":"BooksCloud","offers":[{"title":"Default Title","offer_id":53344786514227,"sku":"9781581120301","price":50.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0300\/5595\/6612\/files\/9KRF8aHp_69781581120301.webp?v=1778732120","url":"https:\/\/www.vysn.com\/en-ca\/products\/photoinduced-intramolecular-charge-transfer-in-donor-acceptor-biaryls-and-resulting-applicational-aspects-regarding-fluorescent-probes-and-solar-energ-paperback","provider":"VYSN","version":"1.0","type":"link"}