Spectral Properties of Dyes with Interfragmental Charge Transfer: Solvatochromism and Solvatofluorochromism of 2-(3-Coumaroyl)-benzopyrylium Perchlorates

<div>Plots of emission band maxima (<svg height="9.71411pt" id="M112" style="vertical-align:-3.31357pt" version="1.1" viewbox="-0.0498162 -6.40054 11.8455 9.71411" width="11.8455pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0136,0,0,-0.0136,0,0)"><path d="M213 67C239 136 257 225 255 300C253 353 242 447 164 447C112 447 54 389 41 319L67 309C90 362 117 377 134 377C184 377 189 277 190 239C193 153 164 43 146 -12H176C278 73 450 253 450 390C450 439 410 463 396 463C384 463 380 459 382 449C385 440 389 415 389 402C389 284 312 146 216 67H213Z" id="g185-47"></path><glyph.data ascent="989" descent="-303" horiz-adv-x="454" vert-adv-y="454"></glyph.data></g><g transform="matrix(.0095,0,0,-0.0095,6.151,3.264)"><path d="M519 0V26C455 32 447 38 447 100V705L439 710C424 702 410 693 394 689C374 702 342 712 312 712C271 707 233 691 195 660C139 615 121 569 114 544C106 521 101 494 101 454V437H54L27 408L31 397H101V100C101 38 94 33 31 26V0H247V26C186 32 180 38 180 100V397H287C298 404 302 428 296 437H180V489C180 565 194 609 211 631C226 652 248 667 279 667C314 667 351 648 368 622V100C368 38 361 31 303 26V0H519Z" id="g190-159"></path><glyph.data ascent="989" descent="-360" horiz-adv-x="533" vert-adv-y="533"></glyph.data></g></svg>) against polarity (a) and nucleophilicity (b). A plot of lifetime value (<svg height="6.42315pt" id="M113" style="vertical-align:-0.2129903pt" version="1.1" viewbox="-0.0498162 -6.21016 6.66793 6.42315" width="6.66793pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M471 456L444 459C426 433 414 430 388 430C324 430 270 434 216 434C103 434 51 374 23 338L43 317C96 366 146 380 221 375L154 109C149 86 147 68 147 52C147 4 168 -12 197 -12C240 -12 291 25 334 71L320 96C295 75 268 58 252 58C238 58 227 79 238 138C251 211 272 296 292 372C310 372 332 368 350 368C391 368 421 369 434 371C444 388 455 413 471 456Z" id="g113-241"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="483" vert-adv-y="483"></glyph.data></g></svg>) against both polarity and nucleophilicity (c) of the medium.</div>

International Journal of Spectroscopy

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Figure 5

Figure 5: Spectral Properties of Dyes with Interfragmental Charge Transfer: Solvatochromism and Solvatofluorochromism of 2-(3-Coumaroyl)-benzopyrylium Perchlorates 

Figure 5 | Spectral Properties of Dyes with Interfragmental Charge Transfer: Solvatochromism and Solvatofluorochromism of 2-(3-Coumaroyl)-benzopyrylium Perchlorates 