ISBN: 9781581120301

This 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… Mehr…

This 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. Experimental 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.Twist 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 1ET with the ground (S0) and 1La 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 1ET with S0 and 1La, the electronic interaction with a close lying 1Lb state plays a fundamental role in the ET dynamics and the 1CT-S0 transition probability in D-A biaryls.The 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 (CT) and a more twisted (CTR) conformer in S1(1CT). 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.The 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. Trade Books>Trade Paperback>Science>Engineering>ELEC Engr, Dissertation.Com Core >1<

ISBN: 9781581120301

by Michael Maus | Paperback, They are not actual photos of the physical item for sale and should not be relied upon as a basis for edition or condition. Publication Date: 1998-11-01. Lang… Mehr…

by Michael Maus | Paperback, They are not actual photos of the physical item for sale and should not be relied upon as a basis for edition or condition. Publication Date: 1998-11-01. Language: English. Pages: 224. Author: Michael Maus Language: EnglishBinding: PaperbackPages: 224Publisher: Dissertation.Com.Publication Date: 1998-11-01 img{max-width:100%}Our eBay StoreTerms & ConditionsStock Photos: The photos displayed within our listings are Stock Photos provided by eBay and the publisher as a visual aid. They are not actual photos of the physical item for sale and should not be relied upon as a basis for edition or condition.Customer Service: Please contact us via eBay messages if you have any questions or concerns regarding your order. Our customer service department is available M-F from 8:00am to 4:00pm PST. Our response time for email inquiries is 24 to 48 hours or 2 business days (M-F).PLEASE NOTE: Should you submit an email inquiry on a Friday after 3:00pm, your inquiry will not be responded to until the following Monday.Feedback: Feedback is left for buyers after purchase has been completed. Should our services meet your satisfaction, your feedback would be greatly appreciated. Should you have an issue or problem with your order, we request the opportunity to make amends or resolve the issue before feedback is left. Your satisfaction is our highest priority!Disclaimer: This item may be a de-commissioned library book and may not include its CD, dust cover, access code and/or accessories., Brand New, Festpreisangebot, [LT: FixedPrice], EAN: 9781581120301, Publication Year: 1998, Format: Trade Paperback, Book Title: Photoinduced Intramolecular Charge Transfer in Donor-Acceptor Biaryls and Resulting Applicational Aspects Regarding Fluorescent Probes and Solar Energy Conversion, Item Length: 8.5in. Genre: Technology & Engineering, Topic: Electronics / Optoelectronics, Optics, Electrical, Power Resources / Alternative & Renewable, Item Width: 5.5in. Number of Pages: 225 Pages, Universal Publishers<

2010, ISBN: 9781581120301

Softcover, PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from… Mehr…

Softcover, PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK., [PU: Dissertation. com]<

1998, ISBN: 1581120303

[EAN: 9781581120301], New book, [PU: Dissertation.com], New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000., Books

1998, ISBN: 1581120303

Kartoniert / Broschiert, mit Schutzumschlag 11, [PU:Dissertation.Com. - DO NOT USE]