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Pulsed Laser Deposition Growth and Characterization of Manganites Thin Films

Thesis Info

Author

Muhammad Waqas Shabbir

Department

Deptt. of Physics, QAU.

Program

Mphil

Institute

Quaid-i-Azam University

Institute Type

Public

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2010

Thesis Completion Status

Completed

Page

69

Subject

Physics

Language

English

Other

Call No: DISS/M.Phil PHY/846

Added

2021-02-17 19:49:13

Modified

2023-02-19 12:33:56

ARI ID

1676717456005

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سورج کی تاب لائیں ستاروں کی کیا بساط


سورج کی تاب لائیں ستاروں کی کیا بساط
اُنؐ کے گدا کے سامنے شاہوں کی کیا بساط

اے خار زارِ شہرِ نبیؐ ! تیرے سامنے
دنیا کے سب حسین نظاروں کی کیا بساط

عشقِ رسولؐ پاک میں مرنا حیات ہے
دنیائے بے ثبات میں زندوں کی کیا بساط

رفتارِ برق ہو یا لپک روشنی کی ہو
وہ راکبِ براقؐ ہیں ؛ دونوں کی کیا بساط

عرفاںؔ! حضورِ رحمتؐ عالم بیان کر
غم کی طویل رات کے قصّوں کی کیا بساط

برما میں روہنگیا مسلمانوں کے مذہبی مسائل اور اس کے اسباب و اثرات

Buddhism is dominated by such other characteristics as sympathy, pity, and kindness. Furthermore, it forbids all kind of cruelty, violence, murder, brutality, and giving pain to any living creature. However, contrary to his teachings, the way his followers have targeted the Rohingya Muslims with violence and atrocities only shows how little they follow Gautama Buddha. Right from the independence of Burma, Buddhists,  declaring Muslims as a threat, started their genocide, which involved attacking their mosques, their homes, dishonoring Muslim women, and harassing the Muslims without any reason. This compelled Muslims to leave their homes and migrate. The recent wave of violence, starting in June 2012,  seriously affected the Muslim majority province of Arakan. Keeping in mind, Arakan is one of the fourteen Burmese provinces, where Islam have ruled since the time of Isalmic Caliphate. Unfortunately, in 1784, Burmese Prince Bodo Phia violated this garden of Islam by carrying out Muslim genocide. He banned all symbols of Islam such as pilgrimage, sacrifice,  prayers, Friday and Eid Prayers, and preaching. This study points out the religious problems and issues of Muslims believers in Arakan including its impact, causes and consequences on their lives. The analytical research Methodolgy has been adopted in this studty.

Introducing the Novel Concept of Multipurpose Functional Ionic Liquids

This dissertation describes the designing, synthesis and applications of a novel functional ionic liquid named as DMF-like Multipurpose Functional Ionic Liquid (MFIL). Its designing is based on attaching N-methylformamide functionality to imidazolium ring through two carbon spacings. It has been synthesized through a viable synthetic scheme in quantitative amount and characterized through latest spectroscopic techniques. After this, its physical parameters like melting point, viscosity, thermal stability, and miscibility behavior were determined. The values of all physical parameters were quite appropriate for it to behave like reasonable ionic liquid to act as solvent or solvent-cum-reagent. With all its structural and physical profile completed, it was evaluated for its efficiency to prove as a better substitute of ordinary DMF. It is fact that DMF does not merely act as a solvent for dissolving reactants, instead it can act as an active reaction media that affects the outcome of certain reactions. In addition to this, it is also used as activator of certain inorganic and organometallic reagents and as precursor for the synthesis of highly valuable Vilsmier reagent. The novel DMF-like multipurpose functional ionic liquid has been evaluated as a better substitute for some of ordinary DMF-dependent reactions like nucleophillic substitution reaction, and as an activator of sodium periodate. Apart from this, the ionic liquid version of Vilsmier reagent was prepared from DMF-like ionic liquid and it was proved to be more stable, water resistant and efficient substitute of ordinary Vilsmier reagent. It was evaluated for some Vilsmier reagent promoted reactions like direct chlorination and iodination of alcohols, N-alkylation of phthalimides, Beckmann rearrangement, and Lossen rearrangement. More interestingly same reagent was also found to be better alternative to Mitsunobu reagent and some of the Mitsunobu reagent catalyzed reactions have been executed successfully. The ionic liquid-based Vilsmier reagent was also used a dehydrating reagent for some reaction occurring by dehydration. Further investigation into the applications and scope of ionic liquid-based Vilsmier reagent indicated that variety of Pummerer rearrangements can be accomplished through it with possibly best yields. All of the above reactions were found to produce relatively more efficient results in DMF-like ionic liquid as compared to ordinary DMF in terms of better yields and faster reaction rates. Apart from this, green reaction conditions, softer reaction condition, easy recovery of products and recycling of ionic reagents thus minimizing the generation of chemical waste were the major salient aspects of the current methodology. Therefore, ionic liquid version of DMF was proved to be efficient substitute of an ordinary DMF. The novel DMF-like MFIL has been designed, synthesized and checked for its potential to accomplish wide range of useful chemical transformations. This has become first of the functional ionic liquids that can perform more the one task. This is in contrast to other functional ionic liquids which are designed as task specific in their performance i.e. they can perform only one specific task. Due to unparallel ability DMF-like functional ionic liquid to promote multifarious applications, it was found to be “multipurpose” functional ionic liquid therefore it has been named as DMF-like multipurpose functional ionic liquid. This is going to be the first example of this kind of ionic liquids thus justifying the title of the thesis.