Researchers have investigated for the first time how two different forms of ນ້ໍາ (ortho- and para-) behave differently when undergoing chemical reactions.
ນ້ໍາ is a chemical entity, a molecule in which a single ອົກຊີເຈນ atom is linked to two hydrogen atoms (H2O). ນ້ໍາ exists as liquid, solid (ice) and gas (vapours). It is among the few chemicals which do not contain ຄາບອນ and still can be liquid at room temperature (about 20 degrees). ນ້ໍາ is ubiquitous and important for life. At the molecular level it is well known that everyday ນ້ໍາ exists in two different forms but this information is not of common knowledge. These two forms of ນ້ໍາ are called isomers and are referred to as ortho- or para- ນ້ໍາ. The main difference between these forms is very subtle and is simply the relative orientation of the nuclear spins of the two hydrogen atoms which are aligned in either same or opposite direction, hence their names. This spin of hydrogen atoms is due to atomic physics though this phenomenon is not yet fully understood. These two forms have identical physical properties and it has been believed so far that they should also then have identical chemical properties.
ໃນການສຶກສາທີ່ຜ່ານມາຈັດພີມມາໃນ ລັກສະນະ Communications, researchers from the University of Basel, Hamburg have for the first time investigated the difference in chemical reactivity of these two forms of ນ້ໍາ and have proven that ortho- and para- forms react very differently. Chemical reactivity means the way or the ability by which a molecule undergoes a chemical reaction. The study involved separation of ນ້ໍາ into its two isomeric forms (ortho- and para-) using an electrostatic deflector by involving electric fields. Since both these isomers are practically the same and have identical physical properties, this separation process is complex and challenging. The separation was achieved by this group of researchers by using a method based of electric fields developed by them for Free-Electron Laser Science. The deflector introduces an electric field to a beam of atomized water. Since there is crucial difference in nuclear spin in the two isomers, this slightly impacts the way by which atoms interact with this electric field. Therefore, as the water travels through the deflector it starts separating into its two forms ortho- and para-.
Researchers have demonstrated that para- ນ້ໍາ reacts around 25 percent faster than ortho-water and its able to attract to a ຕິກິຣິຍາ ຄູ່ຮ່ວມງານທີ່ເຂັ້ມແຂງກວ່າ. ນີ້ໄດ້ຖືກອະທິບາຍຢ່າງແນ່ນອນໂດຍຄວາມແຕກຕ່າງຂອງການຫມຸນນິວເຄລຍທີ່ມີອິດທິພົນຕໍ່ການຫມຸນຂອງໂມເລກຸນນ້ໍາ. ນອກຈາກນີ້, ພາກສະຫນາມໄຟຟ້າຂອງ para-water ສາມາດດຶງດູດ ion ໄດ້ໄວຂຶ້ນ. ກຸ່ມດັ່ງກ່າວໄດ້ດໍາເນີນການຈໍາລອງໂມເລກຸນນ້ໍາໃນຄອມພິວເຕີຕື່ມອີກເພື່ອຢືນຢັນການຄົ້ນພົບຂອງພວກເຂົາ. ການທົດລອງທັງຫມົດແມ່ນເຮັດດ້ວຍໂມເລກຸນໃນການຕັ້ງຄ່າອຸນຫະພູມຕໍ່າຫຼາຍເກືອບ -273 ອົງສາເຊນຊຽດ. ນີ້ແມ່ນປັດໃຈສໍາຄັນດັ່ງທີ່ໄດ້ອະທິບາຍໂດຍຜູ້ຂຽນວ່າພຽງແຕ່ໃນເງື່ອນໄຂດັ່ງກ່າວລັດ quantum ສ່ວນບຸກຄົນແລະເນື້ອໃນພະລັງງານຂອງໂມເລກຸນສາມາດຖືກກໍານົດໄດ້ດີແລະຄວບຄຸມໄດ້ດີກວ່າ. ຊຶ່ງຫມາຍຄວາມວ່າໂມເລກຸນນ້ໍາຄົງທີ່ທັງສອງຮູບແບບຂອງມັນແລະຄວາມແຕກຕ່າງຂອງພວກມັນກາຍເປັນທີ່ຊັດເຈນແລະຊັດເຈນ. ດັ່ງນັ້ນ, ການສືບສວນປະຕິກິລິຍາທາງເຄມີຫຼັງຈາກນັ້ນສາມາດເປີດເຜີຍກົນໄກແລະນະໂຍບາຍດ້ານພື້ນຖານທີ່ນໍາໄປສູ່ຄວາມເຂົ້າໃຈທີ່ດີຂຶ້ນ. ຢ່າງໃດກໍ່ຕາມ, ການນໍາໃຊ້ຕົວຈິງຂອງການສຶກສານີ້ອາດຈະບໍ່ສູງຫຼາຍໃນເວລານີ້.
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{ທ່ານສາມາດອ່ານເອກະສານການຄົ້ນຄວ້າຕົ້ນສະບັບໄດ້ໂດຍການຄລິກທີ່ລິ້ງ DOI ທີ່ໃຫ້ໄວ້ຂ້າງລຸ່ມນີ້ໃນລາຍຊື່ແຫຼ່ງທີ່ອ້າງອີງ}
ແຫຼ່ງຂໍ້ມູນ (s)
Kilaj A et al 2018. ການສັງເກດການ reactivities ທີ່ແຕກຕ່າງກັນຂອງ para ແລະ ortho-water ຕໍ່ trapped diazenylium ions. ການສື່ສານທໍາມະຊາດ. 9(1). https://doi.org/10.1038/s41467-018-04483-3
