[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-634756-105":59,"doc-detail-634756-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","solid-state-and-solution-nitrate-photochemistry-photochemical-evolution-of-the-solid-state-lattice","Solid State and Solution Nitrate Photochemistry - Photochemical Evolution of the Solid State Lattice","","We investigate deep-UV (229 nm) photochemistry of NaNO3 both in aqueous solution and as a solid. In solution, excitation induces NOh3 to photolyze into NOh2 and O3 through strong π f π* transitions, with UV resonance Raman quantifying dose dependence and giving a quantum yield of ~0.04 at pH 6.5. In the solid state, NOh2 formation occurs but the quantum yield drops at ~10^-8, reflecting lattice-constrained, flux- and dose-dependent evolution: stress, surface eruptions, cratering, and pressure buildup.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/solid-state-and-solution-nitrate-photochemistry-photochemical-evolution-of-the-solid-state-lattice/634756/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/solid-state-and-solution-nitrate-photochemistry-photochemical-evolution-of-the-solid-state-lattice/634756.png","ImageObject",300,407,{"name":92,"@type":93},"cryingin4k","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-22",true,{"@type":102,"interactionType":103,"userInteractionCount":8},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What photochemical reaction pathway is observed for NaNO3 at 229 nm in aqueous solution?","Question",{"text":112,"@type":113},"Deep-UV excitation drives NOh3 via a strong π f π* transition, leading to photolysis NOh3 → NOh2 + O3. UV resonance Raman tracks how the NOh2 features evolve with photon dose.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the quantum yield of NaNO3 photolysis differ between solution and the solid state?",{"text":117,"@type":113},"The solution quantum yield is ~0.04 at pH 6.5, while the solid-state quantum yield is much smaller at approximately ~10^-8 due to lattice constraints.",{"name":119,"@type":110,"acceptedAnswer":120},"How do UV flux and dose affect solid NaNO3 during photochemistry?",{"text":121,"@type":113},"Low flux/dose produces resonance Raman bands consistent with lattice stress, while higher flux/dose reduces lattice perturbation but causes SEM-observed surface eruptions, cratering, and destruction as surface layers convert to NOh2. At the lowest fluxes, pressure buildup competes with effusion to reach a steady state.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},634756,1792674451,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":143},137458181193,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","[pubs.acs.org/JPCA](pubs.acs.org/JPCA)  \nSolid State and Solution Nitrate Photochemistry: Photochemical Evolution of the Solid State Lattice  \nSanford A. Asher,* David D. Tuschel, Todd A. Vargson, Luling Wang, and Steven J. Geib Department of Chemistry, University of Pittsburgh, Pittsburgh Pennsylvania 15260, United States  \nABSTRACT: We examined the deep UV 229 nm photochemistry of NaNO3 in solution and in the solid state. In aqueous solution excitation within the deep UV NOh3 strong π f π* transition causes the photochemical reaction NOh3 f NOh2 þ O 3 . We used UV resonance Raman spectroscopy to examine the photon dose dependence of the NOh2 band intensities and measure a photochemical quantum yield of 0.04 at pH 6.5 . We also examined the response of solid NaNO3 samples to 229 nm excitation and also observe formation of NOh2 . The quantum yield is much smaller at ∼ 10􀀁8 . The solid state NaNO3 photochemistry phenomena appear complex by showing a significant dependence on the UV excitation flux and dose. At low flux/dose conditions NOh2 resonance Raman bands appear, accompanied by perturbed NOh3 bands, indicating stress in the NaNO3 lattice. Higher flux/dose conditions show less lattice perturbation but SEM shows surface eruptions that alleviate the stress induced by the photochemistry. Higher flux/dose measurements cause cratering and destruction of the NaNO3 surface as the surface layers are converted to NOh2. Modest laser excitation UV beams excavate surface layers in the solid NaNO3 samples. At the lowest incident fluxes a pressure buildup competes with effusion to reach a steady state giving rise to perturbed NOh3 bands. Increased fluxes result in pressures that cause the sample to erupt, relieving the pressure.  \n’INTRODUCTION  \nNaNO3 is utilized in many chemical and industrial processes, and also utilized as an energetic material in explosives. It is important to understand the factors that enable NaNO3 to function as an explosive and to develop methods to easily, remotely detect it. 1􀀁3 In theworkherewe utilize deep UVresonance Raman spectroscopy (UVRRS) to probe the nature of the NaNO3 electronic excited states and their complex photochemistry.4,5 We find strong RR enhancement of the NOh3 stretching fundamentals, as well as overtones, indicating that the excited state is displaced relative to the ground state.6􀀁10 The large deep UV Raman cross sections and the large number of intense overtones and combinations indicate  \nthat NaNO3 can be spectroscopically detected easily with  \nexcitation. 11􀀁13 UVRR may prove a useful technique for h  \ndeep UV stand off  \nmonitoring of NO3 species.  \nWe find that the displaced NOh3 excited state correlates with afacile NOh3 photochemistry in aqueous solution with 229 nm light; 14􀀁22 we measure a quantum yield, j ≈ 0.04 for the photolysis: NOh3 f NOh2 þ O 3 . We demonstrate that this photochemistry also occurs in the solid state, but that the lattice constraints dramatically decrease the quantum yield. This monophotonic photochemistry at individual lattice sites perturb NOh3 molecules at adjacent lattice sites, shifting the NOh3 Raman bands. The perturbations of the NOh3 lattice sites depend upon not only the photon dose but also on the laser flux. Higher doses and fluxes give rise to photochemistry that degrade and excavate the solid NaNO3 surfaces.  \nWe carefully examined the evolution of the lattice as the photochemistry progressed. We also examined the photochemical  \nquantum yield for photolysis in the solid state of NaNO3 to examine the dependence of the activation barriers for photochemistry on the lattice geometry.  \nThe work here also characterizes the evolution of the deep UV Raman spectra of NaNO3 with deep UV excitation. This information will prove valuable for defining the time and flux varying Raman signature of these types of compounds upon deep UV excitation, that might be used, for example, for standoff detection. These studies also examine the dependence of photochemistry on soli","cbCaiiHPdvVwsJQx","https://ap.wps.com/l/cbCaiiHPdvVwsJQx","pdf",3115066,"English","# Abstract\n# Introduction\n# Experimental Section","[{\"question\":\"What photochemical reaction pathway is observed for NaNO3 at 229 nm in aqueous solution?\",\"answer\":\"Deep-UV excitation drives NOh3 via a strong π f π* transition, leading to photolysis NOh3 → NOh2 + O3. UV resonance Raman tracks how the NOh2 features evolve with photon dose.\"},{\"question\":\"How does the quantum yield of NaNO3 photolysis differ between solution and the solid state?\",\"answer\":\"The solution quantum yield is ~0.04 at pH 6.5, while the solid-state quantum yield is much smaller at approximately ~10^-8 due to lattice constraints.\"},{\"question\":\"How do UV flux and dose affect solid NaNO3 during photochemistry?\",\"answer\":\"Low flux/dose produces resonance Raman bands consistent with lattice stress, while higher flux/dose reduces lattice perturbation but causes SEM-observed surface eruptions, cratering, and destruction as surface layers convert to NOh2. At the lowest fluxes, pressure buildup competes with effusion to reach a steady state.\"}]","Solid State and Solution Nitrate Photochemistry - Photochemical Evolution of the Solid State Lattice | PDF",23]