wo photon absorption active; but, it is not guaranteed that they will exhibit interesting and useful three photon absorption properties such as frequency up-converted lasing . Based on this reason, our University Department of Chemistry Prof Ricky Wong Man Shing and his student Dr.Xin Jiang Feng have developed and synthesized a new set of organic complexes p-PhN-OF(n)-TAZ n = 2 to 6 from deep investigation and collection of fundamental information and applications such as multi-photon properties and multi-photon cavityless lasing etc. The most important aspect is that it can let us explore and understand the more Physics behind the discovery. In this chapter, am going to analyse the use of p-PhN-OF(n)-TAZ series for a set of nonlinear optical experiments to verify the multi-photon properties. The p-PhN-OF(n)-TAZ series are type of D--A using oligofluorenes (OF) as a conjugated core end capped in which D is the end capped with the electron – donating diphenylamino group and the unconventionally employed electron-deficient 1,2,4-triazole (TAZ) derivates as an acceptor designed and synthesized for multiphoton absorption investigation . The electron was pushed from Donor (D) to pull side of Acceptor (A) in the - conjugation system which is called intramolecular charge transfer. In addition, the size of length of conjugation is related to enhance the cross section value of two-photon absorption and three-photon absorption . Unless, the value of cross section is reach to saturation level.
Under fig 4.1, the linear absorption spectra of the organic materials p-PhN-OF(n)-TAZ series (n = 2 ~ 6) was dissolved in Toluene solution, the series exhibits the two absorption peaks characteristics. The weak absorption peak appears around 300-310 nm attributed to the n* transition of triarylamine moieties and the broad absorption band spanning from 378-415 nm corresponds to the * transition of fluorene-based -conjugated core. The
Therefore, there are many research groups which are drawing greater attention on organic material. The most common one is the organic material which consists of a typical…
Name: Instructor’s Name: Course: Date of Submission: Organic Food Outline The organic food industry has been booming in the United States. This has resulted in many arguments regarding the fact that whether organic food is superior in nutritive value and has other benefits over the conventional foods.
Ours is a time dominated and completely taken over by issues after issues that come up on a daily basis courtesy of the activities of the human race. Amid the hue and cry that characterizes the concern for the climate crisis, another fundamental issue continues to take shape and seeks attention and address across the world.
PCBs are organohalogens prepared by having chlorine react with biphenyl, an aromatic hydrocarbon used as a heat-transfer fluid. These compounds are found to have high resistance toward decomposition and due to low levels of environmental degradation, PCBs proceed to dwell in bodies of water, soil, and in an organism’s fatty tissue. They are biologically toxic to aquatic creatures, both vertebrates and invertebrates.
The objective of the report is to gain better understanding about different aspects of organic foods and how it is different from transgenic foods and regular food items in terms of safety and taste. The report is intended to highlight the disadvantages of organic foods and transgenic foods which can increase the concern among its consumers.
Organic farming is a young growing industry. In general terms, it is built around the idea of producing food that green, clean, and healthy. In other words, the production process is designed to use sustainable products, and no part of the process uses any form of artificial chemicals to enhance its products.
Growth and profits are very essential for the very basic existence of a company. The three most commonly used measures are either by increase in profits, increase in assets or increase in sales. A company can achieve its growth objectives in two ways: either internally (organically) by the means of increasing its own assets or output through reinvestments or externally (inorganically) by the means of mergers and acquisitions.
Architects Gustav Stickley, Antoni Gaudi, Frank Lloyd Wright, Louis Sullivan, Bruce Goff, Rudolf Steiner, Bruno Zevi, Hundertwasser, Imre Makovecz and most recently Anton Alberts and Laurie Baker are all famous for their work with organic architecture. The term "Organic Architecture" was coined by the famous architect, Frank Lloyd Wright (1868-1959), though never well articulated by his cryptic style of writing.
Organic foods have a growing market, even though they have higher prices than conventional foods (Winter and Davis 118). The high demand for organic foods can be attributed to the benefits obtained from the food substances. Organic foods are nutritious and healthy because they do not contain harmful chemicals in farming.
For an academic project to be successful, a review has to be done, and all implications drafted. Accurate focusing on literature is important for any project to turn out successful and the findings to come out as expected. A literature review should be
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