diff --git a/content/dataset.html b/content/dataset.html
index 24a0c1ea..0f8cd4e3 100644
--- a/content/dataset.html
+++ b/content/dataset.html
@@ -99,12 +99,12 @@ draft: false
     var data = await loadAllData()
     window.defaultDats = []
     for (const sub of Object.values(data)) {
-      for (const doi of uniq(sub.map(d => (d.DOI == null ? "" : d.DOI.string)))) {
-        const subdoi = sub.filter(d => (d.DOI == null ? "" : d.DOI.string) === doi)
+      for (const doi of new Set(sub.map(d => d.DOI))) {
+        const subdoi = sub.filter(d => (d.DOI == null ? "" : d.DOI) === doi)
         for (mol of uniq(subdoi.map(d => d.molecule))) {
           const submol = subdoi.filter(d => d.molecule === mol)
           const source = submol.find((d) => {
-            if ((d.DOI == null ? "" : d.DOI.string) === "10.1021/acs.jctc.8b01205") {
+            if ((d.DOI == null ? "" : d.DOI) === "10.1021/acs.jctc.8b01205") {
               return d.method.name === "CASPT2" && d.method.basis === "aug-cc-pVDZ"
             } else {
               return d.method.isTBE
@@ -120,7 +120,7 @@ draft: false
 
       window.defaultDats = window.defaultDats.concat(sub)
     }
-    await doiCache.addRange(Array.from(new Set(window.defaultDats.filter(d => d.DOI !== null).map(d => d.DOI.string))))
+    await doiCache.addRange(Array.from(new Set(window.defaultDats.filter(d => d.DOI !== null).map(d => d.DOI))))
     window.defaultDats = window.defaultDats.sort((datfa, datfb) => {
       const DOIa = datfa.DOI
       const DOIb = datfb.DOI
@@ -134,8 +134,8 @@ draft: false
         return -1
       }
       else {
-        const puba = doiCache.get(DOIa.string).format('data', { format: 'object' })[0]
-        const pubb = doiCache.get(DOIb.string).format('data', { format: 'object' })[0]
+        const puba = doiCache.get(DOIa).format('data', { format: 'object' })[0]
+        const pubb = doiCache.get(DOIb).format('data', { format: 'object' })[0]
         return pubUtils.getIssuedDate(puba) - pubUtils.getIssuedDate(pubb)
       }
     })
@@ -290,7 +290,7 @@ draft: false
       case "basis":
         return data.method.basis
       case "DOI":
-        return data.DOI === null ? "" : data.DOI.string
+        return data.DOI === null ? "" : data.DOI
       default:
         return data[name]
         break;
@@ -306,7 +306,7 @@ draft: false
     var sdatdic = new Map()
     for (const d of window.filtData) {
       const key = JSON.stringify(d.method)
-      const doi = (d.DOI == null ? "" : d.DOI.string)
+      const doi = (d.DOI == null ? "" : d.DOI)
       const SetName = publis.findSetNameFromDOI(doi,true)
       if (!(sdatdic.has(key))) {
         sdatdic.set(key, new Map())
@@ -423,7 +423,7 @@ draft: false
       })
     })
     window.T1ref = new Map()
-    var dois = new Set(window.filtData.map((d) => d.DOI === null ? "" : d.DOI.string))
+    var dois = new Set(window.filtData.map((d) => d.DOI === null ? "" : d.DOI))
     var mols = new Set(window.filtData.map((d) => d.molecule))
     await window.doiCache.addRange(dois)
     for (const doi of dois) {
@@ -431,7 +431,7 @@ draft: false
       window.T1ref.set(setName, new Map())
       for (const mol of mols) {
         window.T1ref.get(setName).set(mol, new Map())
-        var TBESortdat = window.dats.filter(d => (d.DOI === null ? "" : d.DOI.string) === doi && d.molecule === mol).sort((d1, d2) => {
+        var TBESortdat = window.dats.filter(d => (d.DOI === null ? "" : d.DOI) === doi && d.molecule === mol).sort((d1, d2) => {
           if (d1.method.isTBE && !d2.method.isTBE) {
             return -1
           } else if (!d1.method.isTBE && d2.method.isTBE) {
@@ -455,7 +455,7 @@ draft: false
       }
     }
     $(sel_ref).empty()
-    for (const el of uniq(window.filtData.map(d => [d.method, (d.DOI === null ? null : d.DOI.string)]))) {
+    for (const el of uniq(window.filtData.map(d => [d.method, (d.DOI === null ? null : d.DOI)]))) {
       op = $("<option/>", {
         value: JSON.stringify(el)
       }).text(el[0])
@@ -474,7 +474,7 @@ draft: false
       var CurrentsetName = undefined
       for (const doi of doiCache.keys()) {
         paperdata = window.filtData.filter((d) => {
-          return (d.DOI === null ? "" : d.DOI.string) == doi
+          return (d.DOI === null ? "" : d.DOI) == doi
         })
         var methods = uniq(paperdata.map(d => d.method))
         const sortedMethods = methods.sort((a, b) => {
@@ -515,7 +515,7 @@ draft: false
         adjustSticky();
         datadic = new Map()
         for (const dat of paperdata) {
-          const doi = (dat.DOI == null ? "" : dat.DOI.string)
+          const doi = (dat.DOI == null ? "" : dat.DOI)
           const setName = publis.findSetNameFromDOI(doi)
           const key1 = dat.molecule;
           const myT1s = T1ref.get(setName).get(dat.molecule)
diff --git a/content/publications.html b/content/publications.html
index 0e430885..0390cd99 100644
--- a/content/publications.html
+++ b/content/publications.html
@@ -20,7 +20,7 @@ draft: false
   window.onload = async function () {
     var div = document.getElementById("publis_div")
     const Cite = require("citation-js")
-    const sdois = uniq(Object.values(await loadAllData()).flat().filter(d => d.DOI !== null).map(d => d.DOI.string))
+    const sdois = uniq(Object.values(await loadAllData()).flat().filter(d => d.DOI !== null).map(d => d.DOI))
     const spubliscite = await Cite.async(sdois)
     const uospublis = spubliscite.format('data', { format: 'object' })
     const spublis = uospublis.sort((puba, pubb) => pubUtils.getIssuedDate(puba) - pubUtils.getIssuedDate(pubb))
diff --git a/static/js/data.js b/static/js/data.js
index 6fe08fe6..8a3f6639 100644
--- a/static/js/data.js
+++ b/static/js/data.js
@@ -115,24 +115,6 @@ class state {
     return tex;
   };
 }
-class DOI {
-  constructor(doistring) {
-    this.string = doistring
-  };
-  static fromString(str) {
-      return new DOI(str)
-  }
-  toString() {
-    var str = this.string;
-    if (this.IsSupporting) {
-      str += " " + "(SI)"
-    }
-    return str
-  };
-  get url() {
-    return new URL(this.string, 'https://doi.org').toString()
-  }
-}
 
 class excitationBase {
   constructor(initial, final, type = '', T1 = null) {
@@ -247,7 +229,7 @@ class dataFileBase {
         this.method = method.fromString(value)
         break;
       case "doi":
-        this.DOI = DOI.fromString(value);
+        this.DOI = value
         break;
     }
   }
@@ -320,7 +302,7 @@ class dataFileBase {
         }
       });
       console.assert(double.length === 0, "Double found", double, dat.molecule, dat.method.toString())
-      if (dat.DOI!== null && dat.DOI.string !== "10.1021/acs.jctc.8b01205") {
+      if (dat.DOI!== null && dat.DOI !== "10.1021/acs.jctc.8b01205") {
         for (const ex of dat.excitations) {
           console.assert(Number.isNaN(ex.T1.valueOf()) | ex.T1 > 50 | ex.isUnsafe == true, "Must be unsafe", dat, ex)
         }